'Mad Men' star January Jones is pregnant, her rep exclusively reveals to PEOPLE.

"January Jones is happy to announce that she is expecting her first child this fall," her rep told the magazine.

The 33-year-old is currently single and hasn't revealed any other details including who the father is. "She's really looking forward to this new chapter in her life as a single mom," her rep added.

Jones broke up with 'Saturday Night Live' star Jason Sudeikis in January. "They've been on and off for a few months, and then the long distance kind of ended it," a source said at the time. "But they could get back together. It was just hard to stay together with the distance."