Angelina Jolie doesn't want to marry Brad Pitt

Despite starting a family with Brad, the actress doesn't want to become his wife.

Angelina told Reader's Digest magazine: "We've both been married before. Our focus when we got together was family, and we are legally bound to our children. That really seems to be the most important thing."

The 'Tomb Raider' star has been married twice before, to British actor Jonny Lee Miller and Billy Bob Thornton, while Brad was previously married to Jennifer Aniston.

The 31-year-old also revealed she and Brad have to sneak off to the bedroom every chance they get to spend some time alone, away from their four children.

The couple have an adopted Cambodian son Maddox, five, three-year-old Vietnamese son Pax Thien, two-year-old Ethiopian daughter Zahara and biological daughter Shiloh who turns one this month.

Angelina said: "Right now, finding quality time is our problem! We hang out. We try to talk over the swing set. We'll have a date night once everybody is settled.

"Especially now with Pax, he still gets scared if I'm gone more than a few hours. But we'll get them occupied with a movie and popcorn and try to run off and lock the door for a bit."