07/21/2011 08:32 am ET | Updated Sep 20, 2011

Jennifer Aniston and Justin Theroux Step Out In London (PHOTO)

Everyone's favorite single gal Jennifer Aniston proved that current boyfriend Justin Theroux is more than just a passing fad by clasping hands in London last night. In town to promote Aniston's new movie, Horrible Bosses, the duo made for a dashing pair, stepping out in matching slim black attire after swinging by East London's glammy Shoreditch House.

Aniston, 42, had just recently introduced Theroux, 40, to father John over lobster and wine at Delmonico's Steak and Lobster House in Los Angeles.