JENNIFER ANISTON finally went public with her steamy new romance with new beau JUSTIN THEROUX last night in London.
Jen – wearing a simple, but elegant black cocktail dress -- walked hand-in-hand with the actor/screenwriter as they left an after-party at Shoreditch House following the UK premiere of her naughty new laffer, Horrible Bosses.
It was the first time the couple has been pap snapped holding hands, RadarOnline.com reported.
Earlier, Jen did the Bosses preem solo in a dazzling Valentino stone-grey cocktail dress.
Aniston, 42, and Theroux, 39, costar in upcoming film Wanderlust, but kept their budding romance a secret, as he had just split from a long-time GF.
Or until Wanderlust preems and this costar coupling goes the way of The Bounty Hunter Gerard Butler.