Ralph Fiennes felt a lot of pressure making 'Coriolanus'.
The 49-year-old actor makes his directorial debut with the Shakespearean adaptation and admits it was hard to juggle helming the project with also acting in it.
He said: "There were days when I thought, 'I haven't got the right performance that I should be giving, but I haven't got time, and I have to move on.'
"And then, the pressure on the head - Got to move on! And even if you think, 'f**k, f**k, f**k' you can't afford to show it."
Ralph admits there were several occasions where he was disappointed with the footage shot each day and was pleased to learn a lot about the editing process.
He added: "Then later, you look at the rushes and you think that's all s**t. And then, thankfully, you learn the magic of editing."
Ralph is rumoured to be taking over from Dame Judi Dench as M in the next instalment of the James Bond series, 'Skyfall', but refused to confirm the speculation.
He said only: "My answer to that is, all this speculation, it's classified information."