Brad Pitt

The ‘Inglourious Basterds’ actor, who has six children with partner Angelina Jolie, accepts his wild days are behind him because parenthood has left him exhausted.

He explained: "I am a father now so my partying has to end at 6pm."

Brad and Angelina - who raise Maddox, seven, Pax, five, Zahara, four, Shiloh, three, and 12-month-old twins Vivienne and Knox - have previously revealed they find it difficult to spend quality time together.

Angelina admitted they have so many children their time alone is often interrupted.

She said: “We've grown to love the chaos of six kids and the fact that you can never stop being mommy and daddy. Even if we lock our door the children come knocking!

"But it's fun and lovely. The thing about having six is, once you've past three or four it's so crazy anyway that it's just more chaos and it's all OK!"

Meanwhile, Brad has jokingly moaned about the stresses of being one of the biggest stars in Hollywood.

He laughed: "It's so tough being an actor. Sometimes they bring you coffee, and sometimes it's cold, and sometimes you don't have a chair to sit on."