EntertainmentCelebrities Jon Hamm and Jennifer Westfeldt have split up: Publicist Actors Jon Hamm and Jennifer Westfeldt attend the PEOPLE Magazine Awards at The Beverly Hilton Hotel on December 18, 2014 in Beverly Hills, California. Photo Credit: Getty / Jason Merritt By REBECCA HARSHBARGER firstname.lastname@example.org September 7, 2015 6:39 PM Print Share Share Tweet Share Email Longtime couple Jon Hamm and Jennifer Westfeldt have split up, according to the actor's publicist. Hamm, 44 and best known for his lead role in "Mad Men," and Westfeldt, 45, of "Kissing Jessica Stein," announced their break-up in a statement yesterday. People.com first reported the story. "With great sadness, we have decided to separate, after 18 years of love and shared history," the couple said in a statement. "We will continue to be supportive of each other in every way possible moving forward." They were last seen together cuddling at a party following the premiere of Netflix's "Wet Hot American Summer: First Day of Camp," according to the New York Post. Hamm was treated for alcohol abuse earlier this year. The couple acted together in the film "Friends with Kids," which Westfeldt wrote and directed. By REBECCA HARSHBARGER email@example.com Share on Facebook Share on Twitter Comments Comments section is temporarily on hold. Here’s why.