Kathryn Newton returns as Cassie Lang in Avengers: Doomsday

Kathryn Newton will reprise her role as Cassie Lang in Avengers: Doomsday, hitting cinemas on 18 December 2026. The confirmation came during Disney's CinemaCon 2026 presentation, followed by Newton's playful Instagram reveal featuring a tiny director's chair that hints at her character's shrinking abilities.

What does the tiny chair actually mean?

According to Newton's Instagram video, the miniature director's chair directly references Cassie Lang's size-changing powers. "It's tiny because Cassie Lang gets tiny," Newton explained in the clip. "She's small. But sometimes she's big. It depends what's happening." This mirrors the Avengers: Doomsday trailer shown at CinemaCon 2026, which confirmed her character's return.

The chair reveal follows Marvel Studios' pattern from the initial Doomsday cast announcement, where actor names appeared on director chairs. Paul Rudd received his own tiny chair during that reveal, suggesting both father and daughter will be shrinking down together in the film.

KATHRYN NEWTON on Instagram: ”#AvengersDoomsday @marvelstudios”

84K likes, 1,358 comments - kathrynnewton on April 17, 2026: ”#AvengersDoomsday @marvelstudios”.

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Cassie Lang's journey from Quantumania to Doomsday

Newton first played the teenage version of Cassie Lang in 2023's Ant-Man and the Wasp: Quantumania. In that film, Cassie becomes an active hero with her own suit, helping Ant-Man defeat Kang the Conqueror in the Quantum Realm. The character's evolution from supportive daughter to full superhero sets up her expanded role in Avengers: Doomsday.

Her return alongside Paul Rudd as Scott Lang/Ant-Man indicates the father-daughter duo will play a significant part in the next chapter of the Marvel Cinematic Universe. Given the hints from both their tiny chairs, expect plenty of size-changing action sequences.

Paul Rudd's thoughts on the tiny chair tradition

Paul Rudd previously shared his reaction to receiving the miniature director's chair during the Doomsday cast reveal. "I thought, 'Oh that's clever, yes I'm Ant-Man.' But there's still the part of me that's like, it's a little emasculating to have a little tiny chair," Rudd admitted. "But at least, finally, one that will actually fit me when I sit down."

The playful acknowledgment shows Marvel's awareness of the visual gag while building anticipation for the characters' abilities in the upcoming film. Both actors seem to embrace the shrinking theme as part of their characters' appeal.

When and where to watch in UAE

Avengers: Doomsday hits UAE cinemas on 18 December 2026, the same date as the global release. While specific cinema chains and screening details haven't been announced yet, major UAE cinema operators like Reel Cinemas, VOX, and Novo typically secure Marvel releases for opening weekend.

The film joins other confirmed Avengers: Doomsday returns including Chris Evans as Steve Rogers, building towards what's expected to be one of the biggest MCU releases since Endgame.

Frequently Asked Questions

Who plays Cassie Lang in Avengers: Doomsday?

Kathryn Newton will reprise her role as Cassie Lang in Avengers: Doomsday. She previously played the character in Ant-Man and the Wasp: Quantumania (2023).

When is Avengers: Doomsday released?

Avengers: Doomsday is scheduled to hit theaters on 18 December 2026. The film will release globally, including in UAE cinemas, on the same date.

Will Cassie Lang have shrinking powers in Avengers: Doomsday?

Based on Newton's tiny director's chair reveal and her comments, Cassie Lang will use her shrinking abilities in the film. She explained that the chair is "tiny because Cassie Lang gets tiny."

Is Paul Rudd returning as Ant-Man in Avengers: Doomsday?

Yes, Paul Rudd is confirmed to return as Scott Lang/Ant-Man in Avengers: Doomsday. He also received a tiny director's chair during the initial cast reveal, indicating he'll use his shrinking powers alongside his daughter.

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