Rocky is the alien that Ryan's character comes across in the film (which you can see in the trailer). Even though there was an April Fool's Day joke the role would be played by Emma Stone, there hasn't been an official casting yet. TBH, I'll see Emma in anything!! Please let Ryan Gosling and Emma Stone reunite.

The comedic sci-fi film from Amazon MGM Studios follows Gosling, whose character makes a leap from unassuming teacher to an astronaut assigned to a risky space mission. The “Barbie” star appears opposite Sandra Hüller (“Anatomy of a Fall”), who convinces Gosling’s character to launch himself into space to save humanity.