Many fans were surprised (one way or another) to find out that Doomsday was in Batman v Superman: Dawn of Justice. Now, the actor who helped bring the CGI creature to life has come forward on Twitter.

Robin Atkin Downes is a voice and motion capture actor, and revealed that he worked on Doomsday in Batman v Superman: Dawn of Justice. It’s not clear if he provided voice over work, motion capture, or both.

You can see Doomsday, Batman, Superman, Wonder Woman, and more when Batman v Superman: Dawn of Justice hits theaters on March 25th!

VIA: Comic Book Movie