Cassandra "Cassie" Lang is a character appearing in American comic books published by Marvel Comics. The daughter of Scott Lang, the character first appeared in Marvel Premiere #47 (April 1979) as Cassie Lang, in Young Avengers #6 (May 2006) as Stature and in The Astonishing Ant-Man #6 (May 2016) as Stinger. A member of the Young Avengers and The Initiative and love interest of Iron Lad, she has the same powers as her father, the ability to shrink and grow in size, although she manifested these powers long after her first exposure to Pym Particles. In the Marvel Cinematic Universe (MCU), the character was portrayed as a child by Abby Ryder Fortson in Ant-Man (2015) and Ant-Man and the Wasp (2018), and as a teenager by Emma Fuhrmann in Avengers: Endgame (2019) and Kathryn Newton in Ant-Man and the Wasp: Quantumania (2023). Publication history Created by David Michelinie and John Byrne, Cassie Lang first appeared in Marvel Premiere #47 (April 1979). She first appeared as Stature in Young Avengers #6 (May 2006), and adopted the identity of Stinger in The Astonishing Ant-Man #6 (May 2016). Fictional character biography Ant-Man's daughter Cassie Lang is introduced to the Marvel Universe as the ill daughter of Scott Lang. Her congenital heart condition forces her father to steal Hank Pym's Ant-Man equipment and Pym Particles, which he uses to rescue Doctor Sondheim, the only doctor able to cure Cassie's condition, from Cross Technological Enterprises. After the divorce of her parents, Cassie lives for most of her childhood with her father, whom she loves and admires greatly. Although Scott tries his best to keep his superhero life secret, Cassie gradually finds out that he is Ant-Man, and secretly experiments with his Pym Particle supplies on her own. She is fascinated by her father's life as a superhero, and generally has a good relationship with her father's colleagues; when she was younger, she even called Tony Stark "Uncle Tony". Scott's time as an engineer for the Fantastic Four brings Cassie to the team's then-headquarters of Four Freedoms Plaza. In the spectacular environment Cassie calls home, she forges a strong friendship with the former ward of Doctor Doom, Kristoff Vernard. During the time they share a home with the Fantastic Four, Cassie helps Kristoff adjust to life outside of Doom's castle, and she develops a crush on him. It is also during this time that she meets