The DCU Has Officially Cast Supergirl, And It's "House Of The Dragon" Star Milly Alcock

BuzzFeed
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On Jan. 29, director and co-CEO of DC Studios James Gunn confirmed on Instagram that Milly Alcock has been cast as Supergirl in his revamp of the DC franchise.

closeup of Milly Alcock on the red carpet wearing a strapless dress with a ruched top
Frazer Harrison / Getty Images

"This is accurate," James wrote in an Instagram post that featured a screenshot of Deadline's article on Milly's casting. "Milly is a fantastically talented young actor, and I’m incredibly excited about her being a part of the DCU. Yes, I first became aware of her in House of the Dragon but I was blown away by her varied auditions and screen tests for #Supergirl. She embodies Kara as envisioned by @tomking_tk, @bilquis and Ana Nogueira."

James Gunn
Christopher Polk/Variety via Getty Images

He later shared his post to his Instagram story, where he wrote, "Welcome to the DCU, Milly Alcock!"

Milly Alcock on the red carpet wearing a short-sleeved leather-like dress
Karwai Tang / WireImage / Getty Images

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

Milly as Rhaenyra holding a book in a scene from "House of the Dragon"
Ollie Upton / HBO

She'll star in the film Supergirl: Woman of Tomorrow. In November, James announced in an Instagram post that Ana Nogueira wrote the screenplay. "We’re excited to be moving forward on this unique take on Supergirl in this beautiful, star-spanning tale," James wrote, in part.

Milly Alcock
Jordan Pettitt/PA Images via Getty Images

Deadline reports it's unconfirmed if Milly will appear as the character in the upcoming Superman: Legacy film starring David Corenswet as Clark Kent.

David Corenswet in a suit and bowtie on the red carpet
Jemal Countess / Getty Images

Milly becomes the latest in a long line of actors to take on the live-action role of Supergirl, who is also known by the name Kara Zor-El. Canonically, she is the cousin of Superman.

Milly Alcock waving
Arnold Jerocki / Getty Images

Sasha Calle most recently played the superhero in last year's film The Flash.

Sasha Calle standing on the battlefield in a scene from "The Flash"
Warner Bros. /Courtesy Everett Collection

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

Melissa Benoist in costume in a scene from "Supergirl"
Dean Buscher / ©The CW / Courtesy: Everett Collection

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

Laura Vandervoort standing on a roof with the American flag flying behind her in a scene from "Smallville"
Michael Courtney / © Warner Brothers Television / Courtesy: Everett Collection

Helen Slater notably starred in the 1984 film Supergirl.

Helen Slater as Supergirl
Warner Bros. / Courtesy: Everett Collection