Olivia Wilde and Jason Sudeikis to play movie lovers

Olivia Wilde and Jason Sudeikis' real-life romance is set to spill onto the big screen - they've been cast as lovers in a new movie, according to a report.

The stars have not commented publicly on their relationship but the actress accompanied Sudeikis to his native Kansas for the Christmas (11) holidays and they were spotted kissing at a basketball game.

Now, Deadline.com reports they've both signed up for forthcoming film Relaxnious, a comedy about a couple hampered by anxiety and agoraphobia issues.

The movie is also slated to star Fred Armisen and Brie Larson.