Milly Alcock reveals her first day on the Supergirl set was opposite David Corenswet, confirming Superman’s appearance in the upcoming DC film.

Alcock Shares Major Set Reveal

December 12, 2025: Supergirl: Woman of Tomorrow star Milly Alcock has confirmed what fans have long suspected — Superman will appear in the movie. The actress revealed that her very first day on set was spent filming opposite David Corenswet, DC’s new Superman, marking the Man of Steel’s official presence in the upcoming film.

The revelation immediately electrified the DC fandom, giving audiences their first concrete confirmation that DC Studios’ connected universe is unfolding exactly as James Gunn envisioned.

“My First Scene Was with Superman”

Alcock shared that she was both nervous and excited to begin her journey as Kara Zor-El by standing toe-to-toe with her iconic cousin. She described Corenswet as “supportive, grounded, and generous,” saying their dynamic helped her tap into the emotional heart of Kara’s story.

Their first scene together reportedly sets the tone for Kara’s arc — highlighting the differences between her traumatic upbringing and Superman’s more hopeful path on Earth.

HOLR has the latest news on DC Studios’ world-building and character crossovers.

A Key Relationship for the New DCU

Superman’s involvement signals that DC is deeply committed to weaving its universe together from the very beginning. Kara and Kal-El’s relationship is central in the comics, but Supergirl: Woman of Tomorrow is expected to highlight how their experiences shaped them into very different kinds of heroes.

While Superman is well-adjusted, hopeful, and embraced by humanity, Kara arrives older, hardened by loss, and struggling to understand her place in the universe.

Fans are eager to see how their dynamic plays out on screen.

David Corenswet’s First On-Screen Crossover

This marks Corenswet’s first crossover appearance as Superman outside his own upcoming standalone film. His presence not only excites fans but also demonstrates the interconnected long-term storytelling strategy at DC Studios.

Insiders say Corenswet filmed multiple scenes for Supergirl, though his exact role in the plot is being kept tightly under wraps.

A Defining Moment for Milly Alcock

Alcock’s excitement reflects just how significant the role is for her career. She has spoken openly about the physical and emotional preparation required to portray Kara Zor-El — a character who, in James Gunn’s vision, is messier, older, and angrier than the traditional Supergirl audiences may know.

Working with Corenswet on day one helped her “understand Kara’s universe,” Alcock said, and grounded the emotional stakes of the story.

HOLR notes that Alcock’s casting has been met with overwhelming enthusiasm, with many calling her the future face of DC’s next era.

What Superman’s Appearance Means for the Film

While Supergirl: Woman of Tomorrow will remain Kara’s story, Superman’s inclusion may provide important context, emotional contrast, and narrative momentum. His presence helps anchor Kara to the broader DC world while reinforcing the differences between their journeys.

The cameo also strengthens anticipation for both the Supergirl film and Corenswet’s standalone Superman movie.

A Growing DC Universe Takes Shape

With Milly Alcock and David Corenswet officially sharing the screen, DC Studios is making clear that its rebooted universe will rely on interconnected storytelling from the start — not retrofitted continuity.