Brad Pitt and Angelina Jolie, who are reportedly expecting twins, are planning to tie the knot in an "intimate ceremony" later this year.

The 32-year-old actress will reportedly walk down the aisle after she gives birth. She and the 'Ocean's 11' star are already parents to their biological daughter Shiloh (21 months) and three adopted children: Maddox (six), Pax (four) and Zahara (three).

But the couple, who met on the set of 2005 film 'Mr and Mrs Smith', want to invite only family and close friends to the wedding.

"Brad has been talking about getting married for ages," a source told Britain's Grazia magazine.

"He is totally devoted to her and their children. It is the right time for them to do this," they added

"It will be a strictly private affair. Brad did the big celebrity-packed wedding when he married Jennifer Aniston. This time it will be an intimate family gathering."

Jolie was previously married to actors Billy Bob Thornton and Jonny Lee Miller

"Angelina has said there will be no big white dress or lots of flowers. At the moment they are looking at hosting a ceremony this summer on a yacht out in the ocean, miles from land, with just their children, Brad's close family and Angelina's brother."

Jolie, whose mother died last year, is reportedly not keen to invite her estranged father Jon Voight. Her brother James Haven will be walking her down the aisle instead.

"Angelina's brother James will give her away. Brad is insisting Jon is invited if they get married. Angie hasn't ruled it out. But, even if Jon does come, Angelina will still insist James gives her away," the source said.

Jolie had a falling out with her father in 2002 after he said, on a talk show, that she needed help for her "mental problems".