Jon Hamm attends the Mad Men screening with Jennifer Westfeldt

Jon Hamm participating in the Mad Men season finale screening with her longtime partner Jennifer Westfeldt Sunday (October 17) in New York. Earlier of the week involved John and Jennifer together at Jaeger-LeCoultre event celebrating the new Hubris Mechanica watch. On Thursday (October 14) 39-year-old actress made a guest appearance on the special live episode of 30 Rock!

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