Celebrity January Jones and Jason Sudeikis Split The Mad Men star and Saturday Night Live actor had been dating since July By Charlotte Triggs Charlotte Triggs Managing Editor, PEOPLE Digital People Editorial Guidelines Published on January 17, 2011 04:45 PM Share Tweet Pin Email Photo: Christopher Polk/WireImage It’s the end of the road for January Jones and Jason Sudeikis. The pair, who were first linked romantically last July, are calling it quits on their relationship, a source confirms to PEOPLE. “They’ve been on and off for a few months and then the long distance kind of ended it,” the source says. “But they could get back together. It was just hard to stay together with the distance.” Jones, who stars on Mad Men is based in Los Angeles, where AMC’s hit period drama is filmed. Sudeikis is part of the ensemble cast that puts on NBC’s Saturday Night Live, which films in New York City.