She stars alongside Anne Hathaway in her new film The Hustle.
And on Thursday, Rebel Wilson revealed a very awkward encounter with the Oscar winner - which saw the comedian grope her breasts.
Appearing on Jimmy Kimmel Live on Wednesday, Rebel spoke about a scene in the film that sees her pretend to be blind and feel Anne up.
Handsy! Rebel Wilson (pictured) has admitted she groped co-star Anne Hathaway's breasts on the set of their new film The Hustle during an interview on Jimmy Kimmel Live on Wednesday
Rebel admitted she took the Hollywood beauty by surprise by improvising the scene, and not telling her she was going to do it.
'Like, I should have told her about it,' Rebel confessed, citing 'actor's etiquette'.
'If you're going to touch somebody inappropriately, you have to tell them before the take and say, "Is it alright if I do this to you?"'
'But I forgot,' she said, adding in a joking tone, 'Maybe, like, deliberately forgot'.
Unexpected: Rebel admitted she took the Hollywood beauty by surprise by improvising the scene, and not telling her she was going to do it
A remake of the classic 1988 film Dirty Rotten Scoundrels, the film co-stars Alex Sharp and Tim Blake Nelson.
In a separate incident, Rebel admitted that her male co-stars haven't escaped her 'handsy' behaviour in the past.
Rebel confessed to sticking her finger 'up the bottom' of co-star Tom Hardy during filming for the movie, This Means War, in 2012.
Remake: The Hustle is an all-female remake of the classic Steve Martin 1988 film Dirty Rotten Scoundrels, with
