James Gunn confirmed Deadline’s reporting on his Instagram page.

She embodies Kara as envisioned by @tomking_tk, @bilquis and Ana Nogueira."

Milly is best known for her role as a young Rhaenyra Targaryen onHouse of the Dragon.

closeup of Milly Alcock on the red carpet wearing a strapless dress with a ruched top

Sasha Calle most recently played the superhero in last year’s filmThe Flash.

Melissa Benoist played Supergirl in the eponymous Arrowverse series from 2015 to 2021.

Laura Vandervoort took on the character in the TV seriesSmallville, appearing from 2007 to 2011.

James Gunn

Helen Slater notably starred in the 1984 filmSupergirl.

Milly Alcock on the red carpet wearing a short-sleeved leather-like dress

Milly as Rhaenyra holding a book in a scene from "House of the Dragon"

Milly Alcock

David Corenswet in a suit and bowtie on the red carpet

Milly Alcock waving

Sasha Calle standing on the battlefield in a scene from "The Flash"

Melissa Benoist in costume in a scene from "Supergirl"

Laura Vandervoort standing on a roof with the American flag flying behind her in a scene from "Smallville"

Helen Slater as Supergirl