Despite the fact that principal photography has been underway for a couple of months, Marvel’s Ant-Man has added a new name to its cast, with The Hollywood Reporter revealing that Martin Donovan (Insomnia) has joined the Phase Three superhero movie in a secret role which is apparently pivotal to the plot.

Armed with the astonishing ability to shrink in scale but increase in strength, con-man Scott Lang (Paul Rudd) must embrace his inner-hero and help his mentor, Dr. Hank Pym (Michael Douglas), protect the secret behind his spectacular Ant-Man suit from a new generation of towering threats. Against seemingly insurmountable obstacles, Pym and Lang must plan and pull off a heist that will save the world.

nt-Man is set for release on July 17th , 2015, with Peyton Reed (The Break-Up) directing a cast that includes Paul Rudd (I Love You Man) as Scott Lang, Michael Douglas (Behind The Candelabra) as Dr. Hank Pym, Evangeline Lilly (The Hobbit: The Desolation of Smaug) as Hope Van Dyne, Corey Stoll (House of Cards) as Darren Cross / Yellowjacket, John Slattery (Iron Man 2) as Howard Stark and Bobby Cannavale (The Long Play), Michael Peña (American Hustle), Abby Ryder Fortson (Togetherness), Judy Greer (Dawn of the Planet of the Apes), David Dastmalchian (The Dark Knight), Wood Harris (The Wire), Gregg Turkington (The Comedy), Martin Donovan (Insomnia) and T.I. (American Gangster) in as yet-unrevealed roles.