# Marvel adds Disney child star to Avengers: Doomsday cast

**Published:** 2026-05-29T23:21:08.000Z  
**Topic:** Marvel  
**Sentiment:** bullish  
**Publisher:** TrendWatcher — https://www.trendwatcher.in/article/207d1506-bc59-4775-b26e-abb724d259be

Disney actress Matilda Firth joins the MCU’s Avengers: Doomsday as a mystery “Little Girl,” expanding the film’s already massive ensemble.

Robert Marvel Studios has confirmed that English actress Matilda Firth, known for Disney’s *Disenchanted*, is part of the upcoming *Avengers: Doomsday* ensemble, listed under the vague character name “Little Girl” [2]. The film, directed by the Russo brothers and slated for a December 18, 2026 release, already boasts a sprawling cast that spans the Avengers, Fantastic Four and X‑Men universes [1].

**Key takeaways**  
- Matilda Firth, who debuted as Bella in Disney’s *Disenchanted*, is credited as “Little Girl” in *Avengers: Doomsday* [2].  
- The role is currently undefined, leaving open the possibility of a brief cameo or a hidden major character [2].  
- *Avengers: Doomsday* will feature an unprecedented crossover of heroes from multiple universes, with filming completed in September 2025 [1].  
- The film is scheduled for release on December 18, 2026, marking the first Avengers theatrical outing since 2019 [1].  

## Expanding the MCU’s biggest ensemble  

*Avengers: Doomsday* brings together characters from the classic Avengers roster, the new Fantastic Four, and the original X‑Men, all converging to confront Robert Downey Jr.’s Doctor Doom [1]. The Russo brothers returned to direct, with Michael Waldron and Stephen McFeely handling the screenplay, and principal photography wrapped at Pinewood Studios in England in September 2025 [1]. Among the confirmed veterans are Chris Hemsworth’s Thor, Anthony Mackie’s Captain America, and Ian McKellen’s Magneto [1].  

The addition of Matilda Firth, whose agency lists her under the generic “Little Girl” credit, adds a youthful element to a film already packed with marquee names [2]. Her previous work includes a feature debut in *Disenchanted*, a horror reboot *Wolf Man*, and a thriller *Subservience*, as well as TV roles on ITV’s *Mr Bates vs The Post Office* and Hulu’s *Nine Perfect Strangers* [2]. The lack of detail on the agency page means the size of her part remains uncertain, prompting speculation about whether she will appear only briefly as a background civilian or serve as a cover for a more significant, surprise character [2].

## Why it matters  

Marvel’s practice of masking key roles behind vague credits suggests that Firth’s “Little Girl” could be a strategic tease, keeping fans guessing until the film’s release [2]. If the role proves larger than a cameo, it would underscore the studio’s willingness to integrate newer talent alongside established stars, enriching the narrative complexity of a multiverse‑spanning showdown. The film’s December 2026 debut will be the MCU’s first major Avengers installment in seven years, and the inclusion of a Disney child star highlights Marvel’s continued cross‑brand collaboration within Disney’s broader entertainment ecosystem [1][2].

## Sources
1. Wikipedia — [Avengers: Doomsday - Wikipedia](https://en.wikipedia.org/wiki/Avengers:_Doomsday)
2. Thedirect — ['Avengers: Doomsday' Has Now Cast Disney's Disenchanted Movie Actress Matilda Firth as Mystery Girl Character](https://thedirect.com/article/avengers-doomsday-cast-disney-disenchanted-actress-matilda-firth-girl-character)

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Cite as: TrendWatcher, "Marvel adds Disney child star to Avengers: Doomsday cast", https://www.trendwatcher.in/article/207d1506-bc59-4775-b26e-abb724d259be