aniston460whitedress.jpgGetty Images for AFI
Jennifer Aniston honored good friend Shirley MacLaine at the 40th annual AFI Lifetime Achievement Award ceremony held at Sony Pictures Studios in Culver City.

The Friends actress, 43, looked gorgeous in a white Burberry dress with a cut-out back and sexy thigh-high slit .... paired with Tabita Simmons sandals and an ivory clutch by Valentino.

A source inside the show tells Us Weekly that Ms. Aniston was busy taking photos with various friends at her table, and was so busy snapping pics, it took her awhile to get to her food. The source adds, "Jen ended up eating her whole entree: grilled fish with shrimp and some mixed veggies."

Eating healthy does a body good!