• SNEAK ATTACK photo | January Jones, Jon Hamm, Kiernan Shipka

Credit: John Shearer/Invision for AMC/AP

Published: Monday November 17, 2014 06:00 AM EST

2014

SNEAK ATTACK

A Jon Hamm photobomb is the best kind of photobomb! The Mad Men actor spoofs his costars January Jones and Kiernan Shipka on Thursday night during the AMC holiday party at Dominick's restaurant in West Hollywood.