Angelina Jolie is an impressive director, Domhnall Gleeson has revealed.
The Irish actor got the chance to work with the actress turned filmmaker on war drama Unbroken.
" She likes to get stuck in. She's some woman. She's great," he gushed.
The 30-year-old continued: "She was everything you want from a great director, you know. She was caring and present - she has a lot of drive and talent and all of those things you need people to be if you really trust the director, and I totally trusted her.
"I think that's about as high a compliment an actor could give a director."
Domhnall, who has been cast in JJ Abrams' new Star Wars film, next stars in Frank alongside Michael Fassbender. He plays an aspiring young musician who joins a band, dreaming of stardom.
The actor - the son of actor Brendan - admitted it wasn't easy learning to play the keyboard for the role.
"I can play the fiddle, the traditional classical instrument, a little bit but I had to learn keyboards for the film. So that was tough, but I learnt what I needed to know and not much else," he said.
He added: "We got to rock out a little bit so that was cool."
Frank, which had its UK premiere at the Sundance London festival, opens in cinemas on May 9.