Both Gunn and Alcock shared the same picture of the latter parked in one of those director chairs that can be found on movie and TV sets to commemorate the start of principal photography at Warner Bros. Studios Leavesden. See for yourself below, and take a close look at the S symbol on the back of the chair.

With the film kicking off production, James Gunn has shared the first look at Milly Alcock as the DCU's Supergirl.

Before Kara Zor-El soars into theaters in 2026, James Gunn shared the first image of Milly Alcock in Supergirl: Woman of Tomorrow.

Woman of Tomorrow, DC Studios co-head James Gunn has shared a new photo from the film’s set teasing Milly Alcock’s appearance as the Girl of Steel. Gunn shared the photo on Instagram which shows Alcock from behind in a set chair with Supergirl’s logo,

"Supergirl: Woman of Tomorrow" star Milly Alcock and DC Studios co-chief James Gunn have shared the first image from the set.

Thrilled to see cameras roll at Warner Bros. Studios Leavesden on Supergirl, with Craig Gillespie at the helm and the phenomenal Milly Alcock as our Kara Zor-El. Craig brings an incredible sensibility to this story, and Milly is every inch the unique #Supergirl envisioned by Tom… pic.twitter.com/za9Tr8Vryr

DC Studios co-head James Gunn is celebrating the beginning of filming of Supergirl, which stars Milly Alcock in the titled role. The filmmaker took to social media to share a teaser photo of Alcock as Kara Zor-El as filming starts on the superhero movie.