Advanced CGI deaging
Video (4K HDR)
On set video (Shows how Michael Douglas looks like on set without CGI deaging).
1) For the flashbacks in 1989, Douglas and Donovan appeared de-aged via CGI, alongside Atwell as Carter (aged in makeup and with CGI) and John Slattery as Howard Stark. To de-age Douglas, Lola VFX used a similar process and technology that was used to make Steve Rogers skinny in Captain America: The First Avenger and Carter older in Captain America: The Winter Soldier as well as footage of Douglas' other films from the late 1980s as reference. Dax Griffin served as Douglas' body double and an additional reference for Lola, because of his "striking resemblance of Michael when he was about 40". For Donovan, he only needed to be de-aged about a decade, so no double was used. The work on him focused on his eyes, neck, and chin. Atwell wore a wig on set, along with a fine layer of latex makeup to give the skin a more leathery look, with Lola transposing the facial features of an elderly actress onto her face.
2) Michael Douglas joked about his being made younger through CGI, saying he felt like doing a prequel to one of his younger films: "Seeing myself CGI-ed at the beginning of the movie thirty years younger was incredible! I had these little dots all over my face, and I'm looking at it and half way through the scene the picture it just appeared and there I was thirty years ago. Romancing the Stone (1984), i'm thinking I'm all for a prequel!"