James Corden has revealed that Mark Ruffalo introduced him to a special 'coffee' during the filming of Begin Again.
Begin Again sees Corden play the best friend of Keira Knightley, but he was also starring in a play at the same time as shooting the film.
Corden liked working with Ruffalo, and says the actor tried to help give him a boost during filming.
Speaking to the Press Association, the actor said: "Mark's adorable, he's just great. He's fantastic.
"I was doing a play in New York at the same time as the film, so there were quite a few days where I'd shoot like 12 'til six in the afternoon and then I'd get in a car and go across the city and do a play and then I'd be back after the play, because there's quite a lot of montage stuff where we'd need to shoot at night.
"There was this one day where we were shooting on the subway. No one had any lines, it was just this montage of us playing music and Mark had this flask of coffee and he said, 'Oh man, you look exhausted. You must need a drink.'
"And I went , 'Yeah, that'd be nice!' And he gave me his coffee flask and I tried it and it was like gin and tonic! And I just went, 'Oh, that's great!'
"And he went to his assistant or someone, 'Can we get James one these coffees?'."
Begin Again follows a singer/songwriter and producer who meet by chance and start to record and album around New York City.
The movie marks the return of John Carney to the director's chair, and is the first film for Corden since One Chance last autumn.
Corden has also completed work on Into The Woods and is currently filming Kill Your Friends with Nicholas Hoult and Rosanna Arquette.
Begin Again is out now.
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