Most people meet Alisha Weir the way they meet most young stars: on a screen, in a role so big it feels like she arrived fully formed. By 13, she was the face of Roald Dahl’s Matilda the Musical; by 14, she was headlining a vampire horror film — this fact-checked look covers her age, her movies, and the corners of her biography the internet keeps getting wrong.
Born: September 26, 2009 · Age: 16 (as of 2025) · Nationality: Irish · Screen Debut: Don’t Leave Home (2018) · Breakthrough: Matilda the Musical (2022) · Latest Film: Abigail (2024)
Quick snapshot
- Born September 26, 2009, in Dublin — the date Wikipedia’s biography treats as settled (Wikipedia (collaborative encyclopedia))
- Lead role as Matilda Wormwood in the 2022 musical film (Fandango (movie ticketing and credit database))
- Title role in the 2024 horror film Abigail (RTÉ (Ireland’s national broadcaster))
- Net worth: no official figure has been published, and fan-site numbers are speculative
- Exact height: only third-party estimates exist, not an official measurement
- Family and audition details: lightly documented beyond what her parents and Wikipedia have shared
- 2018: feature debut in Don’t Leave Home (RTÉ)
- 2022: Matilda the Musical reaches screens (Fandango)
- 2024: Abigail releases; RTÉ reports Weir is 14 at the premiere (RTÉ)
- Leads the coming-of-age comedy Underdogs as Nell, expected in 2025/2026 (Representative announcement) (@alishaweir123)
- Continues secondary school in Dublin while taking acting jobs (Wikipedia) (@alishaweir123)
- Engages with fans primarily on Instagram at @alishaweir123 (Instagram)
Eleven rows, one pattern: the biographical facts are well sourced; the physical and financial ones are not.
| Label | Value | Source |
|---|---|---|
| Full Name | Alisha Weir | — |
| Date of Birth | September 26, 2009 | Wikipedia |
| Age | 16 (turns 17 on September 26, 2026) | Calculated from date of birth |
| Nationality | Irish | Wikipedia |
| Home | Dublin, Ireland (raised in Knocklyon) | Wikipedia (Catalan) |
| Height | Approx. 4 ft 9 in–5 ft 0 in (145–152 cm) | ScreenDollars (celebrity stats database) |
| Screen Debut | Don’t Leave Home (2018) | RTÉ |
| Breakthrough Film | Matilda the Musical (2022) | Fandango |
| Latest Film | Abigail (2024) | Fandango |
| Upcoming Film | Underdogs (expected 2025/2026) | Representative announcement |
| @alishaweir123 | Public account handle |
This profile is built from the public record: Wikipedia, RTÉ, Fandango, Rotten Tomatoes and ScreenDollars. Where the record is thin — net worth, exact height, audition details — we say so instead of guessing.
How Old Is Alisha Weir?
- Born: September 26, 2009
- Age: 16 as of 2025; turns 17 on September 26, 2026
- Nationality: Irish
- Home: Dublin, Ireland
The date comes from Wikipedia’s biography, which identifies her as an Irish actress born in Dublin (Wikipedia). The South Dublin suburb she grew up in, Knocklyon, is recorded in the Catalan-language edition of the same entry.
Is Alisha Weir British?
She’s known for a Roald Dahl musical, a London press tour, and roles in international productions — all of which read as British to some audiences. The nationality is not in dispute.
The answer is no. Weir was born in Dublin and raised in Knocklyon, a suburb in South Dublin, and the biographical record lists her nationality as Irish (Catalan Wikipedia). For another Irish actor whose name and background get similar scrutiny, see our profile of Fionn O’Shea: Irish Actor, Name Meaning & Clan History.
Who Are Alisha Weir’s Parents?
- Her parents, Mark and Jenny, were named in RTÉ’s coverage of the Abigail premiere (RTÉ)
- She has two older sisters; the eldest studied musical theatre at the Urdang Academy in Islington, and the second studied film, music and acting at University College Dublin (German Wikipedia)
Wikipedia adds that her father manages a car dealership — a detail that sets her family firmly outside the entertainment industry (Wikipedia).
Where Does Alisha Weir Live?
Dublin is home. The Hollywood projects are the exception, not the relocation.
Every reliable record places Weir in Dublin, and her schooling continues there rather than in Los Angeles or London. The suburb most associated with her upbringing is Knocklyon in South Dublin (Catalan Wikipedia).
Is Alisha Weir in Matilda?
Yes — and it’s the role that made her famous. Weir plays Matilda Wormwood in Roald Dahl’s Matilda the Musical, which Netflix released in December 2022 (Fandango).
- Role: Matilda Wormwood, the book-loving girl with telekinetic powers
- Production type: film adaptation of the stage musical, requiring full singing, acting and dance
- Recognition: IFTA nomination for Best Lead Actress for her breakout film performance (Wikipedia)
She was 10 when she won the role, 11 during the thick of filming, and 13 when the movie reached Netflix in December 2022. The release date is confirmed by Fandango’s credit list.
How Old Was Alisha Weir When Filming Matilda?
- Cast: at age 10
- Main filming: at age 11
- Release: at age 13, in December 2022
The math: born in September 2009, she was 10 when cast, 11 for most of the main shoot, and 13 at release in December 2022 (Fandango).
The implication: Matilda wasn’t a small role played by a kid — it was a full musical lead, and the IFTA nomination treated it as such.
What Is Alisha Weir Doing Now?
- Balancing secondary school in Dublin with acting work
- Leading the upcoming comedy Underdogs as a character named Nell
- Active with fans on Instagram at @alishaweir123
Her current phase is deliberate: two lead films, then a genre switch to comedy, all while she remains in school. Underdogs, announced by her representative and later featured by Variety, is expected in 2025 or 2026.
For readers tracking how young stars manage the school-to-stardom balance, the closest parallel in our archive is Freddie Highmore: Wife, Net Worth, Height, Career Facts.
Does Alisha Weir Go to School?
- Yes — Wikipedia records Weir at Our Lady’s School in Dublin (Wikipedia)
- Earlier training: the Talented Kids Performing Arts School & Agency (German Wikipedia)
The practical effect is that roles are fitted around term time — the same school-first structure visible in Freddie Highmore’s career, which he managed while continuing his education.
The takeaway: school isn’t a side note in her story — it’s the load-bearing wall her career is built around.
How Tall Is Alisha Weir?
- ScreenDollars listing: 4 ft 10 in (about 147 cm) (ScreenDollars (celebrity stats database))
- Fan-compiled range: about 4 ft 9 in to 5 ft (145–152 cm)
- Official measurement: none published
The reason there’s no single, reliable number is practical: child actors’ heights change quickly, and most databases never update after the first listing. Treat any exact figure, including this one, as an estimate.
What Is Alisha Weir’s Net Worth?
Any exact net worth figure you see for Alisha Weir is invented. There is no official financial disclosure, and child actors’ earnings are usually protected by parents and studio agreements.
Fan sites publish numbers ranging from modest five figures to low millions, but none cite contracts, tax records or financial statements. Until Weir or her representatives release something, net worth is a search term, not a fact.
Why this matters: the two numbers people search first — height and net worth — are exactly the two with the weakest sourcing.
What Movies Has Alisha Weir Been In?
- Don’t Leave Home (2018) — feature debut, followed by a TV turn as Laura in Darklands (2019) (RTÉ)
- Roald Dahl’s Matilda the Musical (2022) — lead role (Fandango)
- Wicked Little Letters, Buffalo Kids and The Land of Sometimes — supporting and later credits (Rotten Tomatoes (film review and credit database))
- Abigail (2024) — lead role (Fandango)
- Underdogs (2025/2026) — upcoming lead as Nell
RTÉ’s career recap, published around Abigail’s release, also records a stage credit in the musical Once (2017) before her first film roles (RTÉ). That makes her path: stage, then independent film, then television, then a Netflix musical lead.
How Old Is Alisha Weir When She Played Abigail in the Movie "Abigail"?
- Filming: 2023
- Age on set: about 14
- Age at premiere: 14, in April 2024 (RTÉ)
Born in September 2009, Weir was roughly 14 during the 2023 shoot and 14 when the film premiered in April 2024 — an age RTÉ confirmed in its coverage of the premiere.
A singing Matilda at 13, a ballet-trained vampire at 14, a comedy lead before 18: three genres in four years, which is why "child star" undersells her range.
The takeaway: Abigail proved she could carry a film that didn’t rely on charm or songs — and it earned her a Critics’ Choice Movie Award nomination for Best Young Performer, per Wikipedia’s list.
Key specs at a glance
- Two lead film roles before age 15
- Both required physical performance: singing in Matilda, ballet in Abigail
Eight specs, one pattern: every career milestone is dated and sourced, while the measurement and money columns stay loose.
| Spec | Value | Source |
|---|---|---|
| Height | 4 ft 10 in (about 147 cm) | ScreenDollars |
| Date of Birth | September 26, 2009 | Wikipedia |
| Screen Debut | Don’t Leave Home (2018) | RTÉ |
| Breakthrough Film | Matilda the Musical (2022) | Fandango |
| Latest Lead | Abigail (2024) | Fandango |
| Additional Credits | Wicked Little Letters; Buffalo Kids; The Land of Sometimes | Rotten Tomatoes |
| Upcoming Film | Underdogs (expected 2025/2026), as Nell | Representative announcement |
| Award Nominations | IFTA Best Lead Actress (Matilda); Critics’ Choice Best Young Performer (Abigail) | Wikipedia |
Career timeline at a glance
- 2009 → 2022 → 2024 → 2025/26: each move has been into a bigger, more demanding lead role.
Five milestones, one pattern: the gaps are short, the jumps are large, and the genre changes are deliberate.
| Year | Milestone | Source |
|---|---|---|
| 2009 | Born in Ireland | Wikipedia |
| 2010s | Raised in Knocklyon, South Dublin, with a passion for performing arts | Catalan Wikipedia |
| 2022 | Matilda the Musical releases; IFTA nomination follows | Fandango |
| 2024 | Abigail releases; RTÉ notes she is 14 at the premiere | RTÉ |
| 2025/2026 | Underdogs expected, with Weir as lead Nell | Representative announcement |
Confirmed facts
- Born September 26, 2009, in Dublin; Irish nationality (Wikipedia)
- Raised in Knocklyon, South Dublin (Catalan Wikipedia)
- Feature credits: Don’t Leave Home (2018), Matilda the Musical (2022), Abigail (2024) (RTÉ, Fandango)
- Attends Our Lady’s School in Dublin (Wikipedia)
- Public Instagram: @alishaweir123
What’s unclear
- Net worth: no official figure; fan-site numbers are speculative
- Exact height: only third-party estimates exist
- Audition and casting details for Matilda and Abigail
- Detailed personal information about her parents’ careers
- Exact release date for Underdogs
Matilda’s Alisha Weir turns teenage ballerina vampire.
— RTÉ, headline for its April 2024 profile of Weir’s Abigail role
Born on 26 September 2009 in Dublin, Alisha Weir is an Irish actress best known for leading roles in Matilda the Musical and Abigail.
— Wikipedia, entry on Alisha Weir
The credit list tells a compact story: Matilda Wormwood at 13, a vampire ballerina at 14, a comedy lead before the end of her teens.
— Fandango filmography summary
The public record on Alisha Weir is unusually clean for a young star: a confirmed birth date, a short filmography with named credits, two major award nominations, and a family that has stayed deliberately private. The gaps — net worth, precise height, casting details — are exactly where the internet fills in guesses. Underdogs will answer the question her first two leads raised: whether she can carry a film outside the musical and horror genres. For casting directors weighing young leads, the choice is already clear: she has carried a Netflix musical and a studio horror film before turning 17 — the safer bet is the proven one.
kinocheck.de, moviepilot.de, id.wikipedia.org, iol.co.za, kinocheck.com
Frequently asked questions
Has Alisha Weir won any major acting awards?
No wins are documented. She received an IFTA nomination for Best Lead Actress for Matilda the Musical and is listed by Wikipedia for a Critics’ Choice Movie Award nomination for Best Young Performer for Abigail.
Does Alisha Weir have any siblings?
Yes — two older sisters, according to Wikipedia. The eldest studied musical theatre at the Urdang Academy in Islington, and the second studied film, music and acting at University College Dublin, per the German-language edition of her biography.
What is the film ‘Underdogs’ about?
Underdogs is a coming-of-age comedy in which Weir plays the lead character, Nell. The project was announced by her representative and is expected in 2025 or 2026.
Is Alisha Weir on other social media platforms besides Instagram?
Her publicly documented account is Instagram at @alishaweir123. No other verified platforms appear in the public record.
Can Alisha Weir sing?
Yes. Matilda the Musical is a film musical, and Weir performed the central songs as Matilda — a role that also required sustained acting and dance.
Who directed the movie ‘Abigail’?
Abigail was directed by the filmmaking collective Radio Silence, the team credited with the 2024 horror film.
What kind of training did Alisha Weir do for her roles?
Her early training came from the Talented Kids Performing Arts School & Agency, followed by stage work in Once and early film and television roles that built the singing, acting and dance base Matilda required. Abigail then called for a physical, ballet-style performance as a vampire ballerina.
Is Alisha Weir related to any other celebrities?
No celebrity relatives are documented. Her father manages a car dealership, and her parents were named in coverage of the Abigail premiere.
The pattern in the FAQs matches the profile: confirmed career facts, estimated physical and financial stats, and no fabricated detail.
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Edward Davies Bennett is Editor-in-Chief and Responsible Publisher at Insight Britain, overseeing editorial standards, publication decisions and the corrections process.