The biggest kiss of the night may not have been the one between Robert Pattinson and Taylor Lautner -- but Jennifer Aniston and rumored boyfriend Justin Theroux!
While the two have been linked -- and even spotted on a date night last week -- Jen and Justin were reportedly all over each other at a MTV Movie Awards afterparty last night, the first time they've been spotted being affectionate with each other in public.
The cameras missed the action, but Us Weekly says they stayed by each other's side all night and kissed throughout the night.
Cameron Diaz and Alex Rodriguez -- who were rumored to have split -- were at the same party and reportedly held hands.
Also spotted at the bash: Taylor Lautner and girlfriend Lily Collins, Emma Watson chatting up newly-single Andrew Garfield, Emma Stone, Chris Evans, David Arquette, Amanda Bynes and Chace Crawford.