Angelina Jolie and Brad Pitt's rare night out on the town at actor Scott Caan's birthday party was almost ruined when the couple narrowly escaped a run-in with Angelina's estranged father, Jon Voight.

After taking in an exhibition at an LA art gallery, the couple went on to the Hollywood party but were forced to spend 30 minutes sitting in their car outside, after learning that Angelina's outspoken father was already inside the birthday bash.

Brad, who starred alongside Scott in Ocean's 11 and Ocean's 12, finally made his way into the party by himself, prompting Voight to make his exit just minutes later.

On hearing that her father had left the building, Angelina finally made her entrance through a back door.

Voight became estranged from Angelina in 2002 when he declared publicly that she needed help for what he called "mental problems".