Jennifer Westfeldt, Jon Hamm Call It Quits

Cue the Kleenex boxes, folks: Jennifer Westfeldt and Jon Hamm are pulling the cord following months of breakup rumors, People reports. The 44-year-old Mad Men star and 45-year-old actress, last seen canoodling at a New York party on July 22, have issued a statement: "With great sadness, we have decided to separate, after 18 years of love and shared history," the couple says. "We will continue to be supportive of each other in every way possible moving forward." That fits, since Hamm credits his now-ex for helping him through alcohol-abuse treatment earlier this year. This adds to a slew of celebrity breakups this summer, including Ben Affleck and Jennifer Garner, Blake Shelton and Miranda Lambert, and Gwen Stefani and Gavin Rossdale, the Daily News reports. (More celebrity breakup stories.)