Michael Cera has admitted he has been "surprised" by how well he's done in Hollywood.
The 21-year-old has made his name in films like Juno and Superbad in recent years, and has been nominated for several acting awards.
He said of his success: "Yeah I've been surprised, but I started acting when I was nine, so it took a while to start feeling that I was going to be able to keep working."
He added: "It's just nice to make movies and work with great people."
The actor's next role is in Youth In Revolt, where he plays a teenager who creates a rebellious French alter-ego. The film is an adaptation of American absurdist writer CD Payne's Youth In Revolt: The Journals Of Nick Twisp.
Michael said: "The book is really funny. It's got a really unique voice and it's gigantic, it takes months to read if you're a slow reader."
With the help of a special effects team and a pair of aviators, the actor was able to inhabit both of his characters on screen. It was no mean feat, but the cast and crew turned to the books for inspiration.
Michael said: "Every situation was different, how we were going to get the two characters into the same frame or sometimes not in the same frame. We developed the characters by rehearsing a lot and talking about the book a lot. The books were a great help in developing the characters, so we had that advantage, which most movies don't have."
:: Youth In Revolt is released in cinemas on February 5.