BEIJING, Sept. 3 (Xinhuanet) -- Brad Pitt says being a father is both fun and a big pain, but he and partner Angelina Jolie are ready for another child. He didn't say biological child or adopted.

Pitt made the announcement Sunday at the Venice Film Festival where he was promoting his new film "The Assassination of Jesse James by the Coward Robert Ford." Casey Affleck and Sam Shepherd also star in the movie directed by Andrew Dominik. Pitt described it as "more a gangster film than a Western."

Pitt and Jolie already have four children including a 15-month-old girl, Shiloh, born to the couple. Jolie has also adopted three children close in age from Cambodia, Ethiopia and Vietnam.

Asked by Italian state TV whether they were ready for a fifth, Pitt replied: "Yeah we're ready."

Earlier on Sunday, Pitt told a news conference fatherhood was fun and good for his work, though he's not getting much sleep.

"It's the most fun I've ever had and also the biggest pain ... I've ever experienced," he said when asked what it was like to become a family with four children in a short space of time. "I love it and can't recommend it any more highly ─ although sleep is nonexistent."

Having four small children "makes me much more efficient because when I work, I really have to focus. I know I've less time to get things done. Actually, I'm quite pleased by it," said Pitt.

Pitt plays wild-west outlaw Jesse James in the last year of his life as he lapses into paranoia over potential betrayal by accomplices and intimates.

(Agencies)