Angelina Jolie and Brad Pitt have reportedly started trying for their second child together.

The 'Beowulf' actress is desperate to have another baby naturally with Brad and is already planning her work schedule around her fertility cycle.

A source told America's OK! magazine: "Angelina's people have told the studio she won't be available on some dates to promote her new movie 'Wanted' in June. She is focusing on trying to get pregnant and to hopefully be pregnant around the time of the film's release."

Angelina, 32, gave birth to her daughter Shiloh in May 2006 in Namibia. The actress also has three adopted children with Brad - six-year-old Cambodian son Maddox, four-year-old Vietnamese son Pax and three-year-old Ethiopian daughter Zahara.

Angelina has made no secret of her desire to extend her family, either by getting pregnant again or adopting. She said last year: "Brad and I would like to have more kids."

"I've always wanted a big family, and Brad's the same. We are enjoying the children together. They are such big personalities, and it's so exciting to watch them grow up."