Robert Pattinson doesn't think he'd return to the Twilight Saga for "a billion dollars."

The British actor has portrayed vampire Edward Cullen in all five movies of the series and admits the thing he was most pleased about coming to an end was wearing uncomfortable contact lenses for the role.

"It's a relief not to put the contact lenses in. It's been absolutely awful having those stupid things in my eyes. Even if they said, 'We'll give you a billion dollars to do it again,' I don't know that I'd want to."

Robert can next be seen starring as billionaire tycoon Eric Packer in Cosmopolis and says the film has given him the "happiest moments" of his life: "I saw Cosmopolis and liked it. I don't normally like my stuff but I didn't really recognize myself. I was so terrified to do it at the beginning and thought I was going to f**k it up and everyone's going to say, '[Director] David Cronenberg's sold out...' so to get it to Cannes was the coolest thing ever. Getting this movie, getting it into Cannes and getting the movie I got recently are three of the happiest moments of my life."