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​Jon Hamm and Jennifer Westfeldt call it quits after 18 years

Jon Hamm and actress-filmmaker Jennifer Westfeldt are calling it quits after 18 years together.

The longtime couple released a joint statement to People on Monday, confirming the news: "With great sadness, we have decided to separate, after 18 years of love and shared history. We will continue to be supportive of each other in every way possible moving forward."

The breakup may not come as too much of a surprise to some, as split rumors have been circulating for months.

Still, though, as People points out Hamm, 44, and Westfeldt, 45, stepped out together in July at the premiere after-party for Netflix's "Wet Hot American Summer: First Day of Camp."

Earlier this year, when Hamm got out of a rehab center for alcohol abuse, he acknowledged Westfeldt for her support throughout his treatment process.

The couple started dating in 1997 and later starred together in the 2011 film, "Friends with Kids." They never married. It marks one of the many recent high-profile celebrity splits, including Ben Affleck and Jennifer Garner; Gwen Stefani and Gavin Rossdale; and Miranda Lambert and Blake Shelton.

Hamm, meanwhile, recently wrapped up his role as Don Draper on AMC's critically-acclaimed series, "Mad Men."

"I'm certainly not the same person that I was when I started the show," Hamm told CBS News earlier this year. "I was 35 years old. I had done, you know, some work here and there. But I have been afforded opportunities that when I graduated college with an English degree and a theatre minor I thought, 'Well, maybe someday I'll get five lines on '90210.' And it's worked out a little better than that."

Hamm is attached to the upcoming film "High Wire Act" with Rosamund Pike.

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