The famous names signing up to star in the upcoming Men in Black 3 film include not just Lady Gaga and Nicole Scherzinger but Justin Bieber as well!
The movie's director Barry Sonnenfeld has revealed that the pop star will act alongside Gaga on an "alien surveillance board".
"The challenge is getting celebrities that are famous, who will give you permission and won't be like: 'Who's that guy?' in ten years" he added.
Men in Black 3 releases on 25 May. We can't wait!