January Jones is pregnant and a single mom-to-be

(CBS) "Mad Men" star January Jones has announced that she is pregnant. A representative told People Magazine that the 33-year-old actress is expecting her first child this fall.

A source close to the actress told People, "She's really looking forward to this new chapter in her life as a single mom."

No mention is made in People of who the father is.

The next season of "Mad Men" will air beginning in 2012. Jones recently appeared in the thriller "Unknown" with Liam Neeson and Diane Kruger.