Kathryn Hahn is set to join George Clooney in Tomorrowland.
The American actress has signed up for a role in Brad Bird's sci-fi film for Disney, said The Hollywood Reporter's Heat Vision blog.
The 40-year-old, last seen in We're The Millers alongside Jennifer Aniston, is tipped to play a character called Ursula in a "funny, scene-stealing" role.
George is already on board to portray a "former boy-genius inventor jaded by disillusionment".
Hugh Laurie and Under The Dome actress Britt Robertson also have parts in the film, which follows a "bright, optimistic teen bursting with scientific curiosity" when they meet George's character, as they embark on a "danger-filled" mission to unearth the secrets of a mysterious place known as Tomorrowland.
Tomorrowland, which has started filming in Vancouver, is scheduled for release in December 2014.
Kathryn, who has appeared in romantic comedies such as The Holiday, How To Lose A Guy In Ten Days and Wanderlust, will next star in Ben Stiller's The Secret Life Of Walter Mitty alongside Sean Penn and Kristen Wiig.
She will also be reunited with Aniston in comedy drama She's Funny That Way, formerly known as Squirrel To The Nuts, which also stars Owen Wilson, Lucy Punch and Joanna Lumley.