Brad Pitt and Angelina Jolie avoided an embarrassing Oscar meeting with Jennifer Aniston by pulling out of a party they were all set to attend.

The pair - who are expecting their second biological child - were due to meet Brad's ex-wife Jennifer at a pre-Oscars party at the Beverly Hills Hotel on Saturday, but instead decided to go to the nearby Film Independent Spirit Awards.

Jennifer spent an hour mingling with stars including George Clooney, Jake Gyllenhaal, Seal and Heidi Klum before retreating back to the one of the hotel's private bungalows.

Meanwhile, Angelina proudly displayed her baby bump by wearing a tight black dress at the Spirit Awards.

News of Angelina's pregnancy has reportedly angered Jennifer, who is so determined to have children she has allegedly had some of her eggs frozen.

A source close to the 39-year-old actress told America's Star magazine: "Having the eggs frozen was a really smart move for Jennifer, because it buys her a few years to figure things out before she rushes into having children."

"She's giving herself a big break from the intense pressure to find her Mr. Right and start a family. She's in a good place now."

Jennifer has recently been romantically linked to 'Sex and the City' star Jason Lewis and 'Thank You For Smoking' actor Aaron Eckhart.

Angelina and Brad have three adopted children, six-year-old Maddox, Pax, four, and three-year-old Zahara, as well as a 21-month-old biological daughter Shiloh.