Rebecca Hall

Yui Mok/PA Wire

Some cold, windy weather didn’t stop Iron Man 3 star Rebecca Hall from wearing a revealing outfit at the film’s London premiere today.

The brunette beauty stole the show in her daring Lanvin jumpsuit that revealed, well, a ton of cleavage and a flash of side boob.

Hall topped the sexy ensemble off with slick pulled-back hair and a bold red lip.

Robert Downey Jr.’s co-star took center stage as she stunned the crowd with her ample décolletage.

Hollywood can’t get enough of the side boob trend!

Do you think it’s a good look? Tell us your thoughts in the comments section below!

PHOTOS: Celebrity side boob—see the pics!

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