Jon Hamm & Vincent Kartheiser: 'Mad Men' Season 6 Premiere!

Jon Hamm and his longtime love Jennifer Westfeldt hit the red carpet at the premiere of the sixth season of his show Mad Men on Wednesday (March 20) at the DGA Theater in Los Angeles.

The 42-year-old actor was joined by his co-star Vincent Kartheiser, whose engagement to Mad Men guest star Alexis Bledel was announced earlier in the day!

John Slattery and Jay R. Ferguson also attended the event.

The sixth season of Mad Men premieres on Sunday, April 7 with a special two-hour episode at 9/8c on AMC!

15+ pictures inside of Jon Hamm and Vincent Kartheiser at the premiere…