Logan Lerman has revealed Emma Watson was a great source of comfort on the "intimidating" set of their new film Noah.
The actor had worked with Harry Potter star Emma on 2012's The Perks Of Being A Wallflower and was delighted to be reunited with her on Darren Aronofsky's biblical epic, as he was in awe of the rest of the A-list cast.
He said: "I'd worked with most of the cast before, but the only real friend I had was Emma. I think she was really comfortable that we were working together too, because it was such an intimidating set to work on with all those guys [Russell Crowe, Jennifer Connelly, Anthony Hopkins] and the material. She was the area of comfort."
Logan, 21, had also previously worked with Russell on 2007's 3:10 To Yuma.
"It had been six years since I'd seen him. I was 14, and he's not going to be keeping in touch with a 14-year-old, but now we're all very close and he's a friend of mine," he said. "If we were to do something in the future, then he'd be a source of comfort."
Logan, who plays Noah's son Ham, said the shoot was "fun - in retrospective".
"Making it was stressful. It was a crazy movie, hectic, but I'm really excited about it. I mean, Darren is an awesome film-maker, so I'm really stoked," he added.
The actor can next be seen in Percy Jackson: Sea Of Monsters, the sequel to Percy Jackson And The Olympians: The Lightning Thief, in which he returns as the titular hero and demigod son of Poseidon (the Greek god of the sea).
It's the first time Logan has revisited a character and he admitted it was easier to bring the mythical world to life the second time round.
"The physical work, like wire-work and sword-fighting, was harder, but then I had experience from the first movie," he said.
:: Percy Jackson: Sea Of Monsters is in cinemas now.