January Jones Is Pregnant!
04/28/2011 AT 07:50 PM EDT
"January Jones is happy to announce that she is expecting her first child this fall," her rep tells PEOPLE exclusively.
While Jones is keeping quiet for now on any other details, a source close to her says, "She's really looking forward to this new chapter in her life as a single mom."
Jones, 33, will next be seen in X-Men: First Class.