2015 Was the Year of Celebrity Breakups — See All the Couples Who Split

In September, Jon Hamm and Jennifer Westfeldt confirmed their breakup in a joint statement, saying, "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 two began dating in 1997 and starred together in the 2011 film Friends With Kids.