Alisha Weir was 11 years old when she began filming Roald Dahl's Matilda the Musical in early 2021. She celebrated her 12th birthday during the final stages of production. By the time the movie premiered in theaters and on Netflix in late 2022, Weir was 13 years old.
The casting of Alisha Weir as the titular character in the 2022 film adaptation of Matilda the Musical was a pivotal moment for the production. Unlike traditional stage productions, which often cast younger children (typically ages 9 to 11) and rotate them frequently due to the physical demands of the role, the film required a performer who could maintain a consistent screen presence throughout a grueling multi-month shoot. Weir’s age and maturity provided the necessary stamina while still capturing the youthful defiance and vulnerability inherent to Roald Dahl’s most famous heroine.
The Exact Age of Alisha Weir During Production
To understand Alisha Weir’s age during the production of Matilda, it is necessary to look at the specific chronology of her birth and the film’s development cycle. Alisha Weir was born on September 26, 2009, in Dublin, Ireland.
Age at Casting (January 2021)
When Netflix and Sony Pictures officially announced that Alisha Weir had won the role of Matilda Wormwood in January 2021, she was 11 years and 3 months old. The casting process was extensive, involving thousands of auditions from young actors across the UK and Ireland. Director Matthew Warchus, who also directed the original stage musical, sought a performer who possessed an "unfussy" quality—someone who felt like a real child rather than a polished "show kid." At 11, Weir was at the upper end of the typical age range for a stage Matilda, which gave her a slight edge in terms of emotional range and professional focus.
Age During Principal Photography (May – September 2021)
Principal photography for the film took place primarily in 2021. Filming began in May 2021, at which point Weir was 11 years old. The production was a massive undertaking, featuring elaborate dance sequences choreographed by Ellen Kane and large-scale sets at Shepperton Studios.
As filming progressed through the summer and into the early autumn, Weir reached the end of her 11th year. The production wrapped its main phase around the time of her 12th birthday in September 2021. This age is significant because it marks the transition from late childhood to early adolescence, a period where a young actor's appearance can change rapidly. The production team had to ensure consistency in her look throughout the shoot, which lasted approximately five to six months.
Age at the Global Premiere (November 2022)
Due to the extensive post-production required for a musical film—including visual effects for Matilda’s telekinetic powers and sound mixing for the orchestral numbers—the movie was not released until late 2022.
- BFI London Film Festival Premiere: October 2022 (Weir was 13).
- UK Cinema Release: November 25, 2022 (Weir was 13).
- Global Netflix Release: December 25, 2022 (Weir was 13).
By the time the world saw her performance, Weir had physically matured beyond the "little girl" image depicted in the film, a common occurrence in child-led cinema.
Why Alisha Weir’s Age Was Ideal for the Musical Adaptation
The decision to cast an 11-year-old rather than a younger child was a strategic one by director Matthew Warchus and the production team. In Roald Dahl’s original book, Matilda is roughly five and a half years old when she starts school. However, the musical adaptation—both on stage and screen—requires the character to perform complex lyrical sequences and high-energy choreography.
Vocal and Physical Maturity
Tim Minchin’s score for Matilda the Musical is notoriously difficult. Songs like "Quiet" require intense breath control and the ability to convey internal monologues through nuanced singing. At age 11, Weir’s voice had the strength to handle the vocal demands of a professional recording studio while retaining the light, youthful timbre required for the character.
Furthermore, the choreography in the film version was significantly expanded from the stage play. The "Revolting Children" and "Naughty" sequences required a level of physical coordination and stamina that is often more developed in an 11- or 12-year-old than in a younger child.
Emotional Intelligence
Matilda is a character who experiences emotional neglect and psychological bullying. Playing this role requires a young actor to understand the gravity of Matilda's situation without becoming overwhelmed by it. At 11, Weir was able to collaborate with veteran actors like Emma Thompson (Miss Trunchbull) and Lashana Lynch (Miss Honey) with a professional "colleague-to-colleague" mindset. This maturity allowed for a more grounded and realistic portrayal of the bond between Matilda and Miss Honey.
The Journey from Dublin to Matilda Wormwood
Alisha Weir’s path to the role of Matilda began in Knocklyon, a suburb of Dublin. Long before she was cast in the Netflix blockbuster, she was honing her craft in local Irish productions.
Early Training
Weir attended the Talented Kids Performing Arts School and MVW Talent Agency, managed by Maureen V. Ward. Her training there began at a very young age, where she studied singing, dancing, and acting. This multidisciplinary background was essential for a musical film role.
Before Matilda, Weir had already appeared in:
- Once (Olympia Theatre, Dublin): Playing the role of Ivanka.
- Darklands: A television drama where she played the character Emma.
- Two by Two: Overboard!: Providing the voice for the character Hazel.
These early experiences meant that when she walked onto the set of Matilda at age 11, she was already a seasoned professional despite her young age. Her ability to take direction and her familiarity with the "waiting" inherent in film production made her an asset to the 2021 shoot.
Comparing Alisha Weir with Previous Matilda Portrayals
The role of Matilda has been played by several notable actors, each at different stages of their childhood. Comparing their ages provides context for Weir's performance.
| Actor | Version | Age During Filming | Primary Medium |
|---|---|---|---|
| Mara Wilson | 1996 Film | 8–9 Years Old | Feature Film |
| Kerry Ingram | 2010 Original Cast | 11 Years Old | Stage Musical |
| Adrianna Bertola | 2010 Original Cast | 11 Years Old | Stage Musical |
| Alisha Weir | 2022 Film | 11–12 Years Old | Streaming/Film |
| Various Child Actors | West End/Broadway | 9–12 Years Old | Stage Musical |
Mara Wilson vs. Alisha Weir
Mara Wilson, who played Matilda in the 1996 Danny DeVito film, was significantly younger than Weir during filming. Wilson’s Matilda focused on the precociousness and "cuteness" of a five-year-old genius. In contrast, Weir’s Matilda, influenced by the stage musical, is more of a "warrior" figure. The slightly older age of Weir (11-12) allowed the 2022 film to lean into the revolutionary themes of the musical, where Matilda leads her classmates in a literal uprising against the school's administration.
Behind the Scenes: The Physical Demands on a Young Actor
Filming Matilda the Musical was not a standard acting job; it was an athletic feat. For an 11-year-old, the schedule was rigorous. UK labor laws for child actors are strict, limiting the number of hours a child can be on set and requiring mandatory tutoring hours.
The "Naughty" Sequence
One of the most famous scenes in the film is the "Naughty" sequence, where Matilda climbs up her house and performs on the roof. While safety harnesses and stunt doubles were used for certain segments, Weir performed a significant portion of her own movements. Her age was a factor in her ability to follow complex safety protocols while maintaining her character's persona.
Training and Rehearsals
Before the cameras even started rolling in May 2021, Weir underwent months of "Matilda school." This involved:
- Vocal Coaching: Learning to sing while moving and ensuring an English accent (as Weir is Irish).
- Choreography Boot Camp: Learning the intricate "miracle" and "revolting" dance steps.
- Acting Workshops: Developing the chemistry between her and Lashana Lynch.
This intensive preparation is typically easier for a child of 11 or 12 to navigate than a younger child, as it requires a high level of concentration and the ability to retain complex information over long periods.
Alisha Weir’s Career Trajectory Post-Matilda (Up to 2026)
Following the success of Matilda the Musical, Alisha Weir’s career has continued to ascend. As of 2026, she is 16 years old and has successfully transitioned from a child star to a sought-after teenage actor.
"Abigail" (2024)
In 2024, at age 14, Weir took on a drastically different role in the horror-thriller Abigail. Playing a vampire ballerina, she showcased her range by moving from a heroic child literary icon to a menacing supernatural antagonist. Her background in dance was again utilized, proving that the skills she sharpened at age 11 for Matilda were foundational for her future career.
Professional Reputation
Industry insiders often cite Weir’s work ethic during the Matilda years as the reason for her continued success. By age 16, she has avoided the common pitfalls of child stardom, maintaining a focus on diverse roles that challenge her acting capabilities. She remains a prominent figure in the Irish acting community and a global representative for young talent in musical cinema.
Frequently Asked Questions
Is Alisha Weir actually Irish?
Yes, Alisha Weir is Irish. She was born and raised in Dublin. For the role of Matilda, she worked with a dialect coach to adopt a Southern English accent, which is the standard for the Roald Dahl adaptation.
How old is Alisha Weir now in 2026?
As of September 26, 2025, Alisha Weir turned 16 years old. Therefore, throughout most of 2026, she is 16 years old, turning 17 in late September 2026.
Did Alisha Weir do her own singing in Matilda?
Yes, Alisha Weir performed her own vocals for the film and the official soundtrack. The recordings were made both in a studio environment and, in some instances, captured live on set to maintain the emotional authenticity of the scenes.
How was Alisha Weir discovered for the role?
She was discovered through a video audition sent by her talent agency in Ireland. Director Matthew Warchus has noted in interviews that out of thousands of tapes, Weir's stood out because of her naturalism and her ability to "act" the song rather than just sing it.
Who played Matilda’s parents in the 2022 film?
While Alisha Weir was 11 during filming, she worked alongside Stephen Graham (Mr. Wormwood) and Andrea Riseborough (Mrs. Wormwood). The age gap between Weir and her on-screen parents helped emphasize Matilda’s isolation and her status as an "outsider" within her own family.
Recommendation for Fans and Researchers
If you are interested in the technical aspects of how Alisha Weir’s age influenced the production, it is highly recommended to watch the "Making of Matilda" features available on Netflix. These documentaries provide a behind-the-scenes look at the tutoring, rehearsals, and developmental milestones Weir experienced while filming. For those following her career, her 2024 film Abigail serves as a perfect comparison piece to see how much she has matured as an actor since her breakout role at age 11.
