Any speculation about the seriousness of Jennifer Aniston
's relationship with Justin Theroux
can officially be put to rest, as the two have finally stepped out in public together holding hands.
In London on Wednesday night, Jen and Justin left an after-party at Shoreditch House hand-in-hand following her U.K. premiere of Horrible Bosses
. The two met on the set of Wanderlust
and at first kept the relationship secret because Justin was with ...