Photos: Actress Gwyneth Paltrow and Brad Falchuk hold 'secret wedding' in LA

'Iron Man' actress Gwyneth Paltrow, 45, and her fiance, producer Brad Falchuk, 47, who announced their engagement in a joint statement in January after three years together, threw a  star-studded party to celebrate their engagement, which many believe was their 'secret wedding' which took place in Los Angeles Theater,  Hollywood on Saturday night.

The event tagged black-tie engagement party for 400 friends and family saw the likes of  Hollywood's greatest such as director Steven Spielberg,  Kate Hudson, Cameron Diaz, Jennifer Aniston, Julia Roberts, Liv Tyler, Reese Witherspoon, Demi Moore and Chelsea Handler among others in attendance.

Paltrow rocked a stunning maroon dress, while her husband to be, donned a white dinner jacket which he paired with black trousers to their engagement party.

The actress shares two children -Apple, 13, and Moses, 12 with musician ex-husband Chris Martin.