Played by Kathryn Newton
Scott Lang's daughter, now a young hero in her own right.
Last seen in Ant-Man and the Wasp: Quantumania (2023)
Cassie fought alongside Scott in the Quantum Realm and returned home with the family.
Revealed in the trailer shown at CinemaCon (April 2026); also in the July 2026 trailer.
Photo: Kathryn Newton in 2023 by 4DX, licensed under CC BY 3.0. Wikimedia Commons.
Photo: 4DX · CC BY 3.0Marvel showed Doomsday footage to theater owners at CinemaCon, where Disney unveiled Infinity Vision, a label for premium large-format screens, after IMAX screens went to Dune: Part Three on the same date. A day later Kathryn Newton confirmed she's back as Cassie Lang.
Titles featuring Cassie Lang, most important first.
Key concepts connected to Cassie Lang.
Avengers: Doomsday · 2026
The first full trailer (July 2026) — the first real look at Robert Downey Jr.'s Doctor Doom.
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Ant-Man and the Wasp: Quantumania · 2023
Scott and Cassie Lang are pulled into the Quantum Realm.
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