Jon Hamm and his partner Jennifer Westfeldt - who directed and stars in Friends With Kids - were robbed while they were in London promoting the film.
A source told Life & Style:
"They were dining at a restaurant and Jennifer's purse was snagged by someone.
"That person took the hotel key in Jennifer's purse, which had the hotel name on it, and robbed their room.
"They had to contact the police, it was horrible."
A second source told them that Jennifer told a friend:
"What a mess. [I'm not feeling] great. It is under investigation."
We hope nothing too important was taken!