They're back! The cast of Mad Men attended the Hollywood premiere last night of Season Five of the hit AMC show ArcLight Cinemas.

Jon Hamm suited up and reminded us why we love him as Mr. Don Draper and posed on the carpet with his longtime partner Jennifer Westfeldt, who looked stunning in a green Kate Spade New York dress.

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And then there was January Jones. Hello, Betty! The actress and new mom looked gorgeous in Roland Mouret. But, did Don's new love of his life show up, Betty?

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Jessica Pare looked sexy in a little black dress for the premiere.

Mad Men returns on AMC on March 25. We can't wait!

SheKnows.com chatted with Jon Hamm on the red carpet! Check out the video below:

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