The 43-year-old Mad Men star was joined at the event by Alyssa Milano, Sting with his wife Trudie Styler, Erin Richards, La La Anthony, Kim Raver, and Ana Gasteyer with her daughter Frances Mary McKittrick.
Recently, a trailer for Jon‘s upcoming special Black Mirror was released and it’s pretty creepy.
Watch the trailer below!
Black Mirror | White Christmas | Channel 4
15+ pictures inside of Jon Hamm, Jennifer Westfeldt, and more at the event… More Here! »