‘Everyone was looking at Margot, she was absolutely stunning,’ says an attendee.
Wearing a burnt orange Grecian-inspired gown, Margot stunned with a subtle face of makeup; her smoky eyes and clay pink lips drawing raves from beauty fans.
After Margot, all eyes were on Brad and Leo, with the Titanic hunk looking dapper in a trim-fitting three-piece.
Far less traditional was serial controversialist Lena Dunham – who channeled her inner flake by playing one of the notoriously disturbing Manson Family women in the film.
She was equally extreme on the red carpet, wearing what appeared to be a faux feather boa over a sequinned bodice with an asymmetric hem.
'It looked like she'd murdered one of the muppets,' said an onlooker.
The event attracted huge crowds, after the film achieved a booming opening weekend in the US.
We can’t wait to see it!