"I've been training with my dad, Pete Steinfeld," the actress and singer tells "Good Morning America". "He's a personal trainer."
"We've been training for this project for over a year now... Being able to do it with my dad has been the best thing in the world - just having that time with him, but it's crazy; he'll go from being my dad to trainer real quickly. No excuses can be made."
The project is just one of the many series in development at the Mouse House streaming service following the conclusion of Phase Three of Marvel Cinematic Universe which started with "Captain America: Civil War" in 2016 and ended with "Spider-Man: Far From Home" in 2019.
The other projects include "WandaVision" starring Elizabeth Olsen and Paul Bettany, "The Falcon and the Winter Soldier" starring Anthony Mackie and Sebastian Stan, "Loki" starring Tom Hiddleston, "What If…?" starring Jeffrey Wright, "Ms. Marvel" starring Iman Vellani, "Moon Knight" with Oscar Isaac attached to play the lead role, and "She-Hulk" with Tatiana Maslany rumored to be the main heroine.