Actress Milly Alcock, known for her role in House of the Dragon, has been praised by fans for her casting as Supergirl in the DCU's Woman of Tomorrow. While there were assumptions about her involvement in the upcoming Superman: Legacy film, director James Gunn may have put a stop to the swirling rumors.

Supergirl: Woman of Tomorrow found its writer in Ana Nogueira in November 2023, with no director attached. Plot details remain largely unknown. This film, which serves as a standalone feature for Superman's cousin Kara Zor-El, follows the Kryptonian as she is sought out by an alien girl named Ruthye for a revenge mission against those who destroyed her world. Emilia Jones, Meg Donnelly, and Alcock were reportedly the top contenders for the role, with Alcock ultimately winning the part.

On January 29th, Alcock's casting as Supergirl was officially announced, a confirmation later reiterated by Gunn on Instagram. The actress was commended for embodying Kara as envisioned by the comic creators Ana Nogueira, Tom King, and Bilquis Evely. Rumors had circulated about Supergirl making her debut in Gunn and Peter Safran's DCU Chapter One