January Jones Births New Real-Life Co-Star: A Son

[caption id="attachment_6339" align="alignleft" width="300" caption="Getty Images"]January Jones[/caption]

January Jones, the erstwhile Emma Frost in "X-Men: First Class," has added a new line to her resume: single mom.

The 33-year-old star welcomed her first child, son Xander Dane, on Tuesday. (Maybe she was a "Buffy" fan?)

Baby and mom are "doing great" her rep confirms to People. Jones kept the sex of her baby a secret, claiming during an interview back in June that it was "going to be a surprise" even for her. Though she announced her pregnancy in April, Jones has kept the baby daddy under wraps, fueling speculation that the father-to-be was ex-boyfriend Jason Sudeikis. (We think it's not, but we could be wrong).

In any case, a source confirmed that Jones is "really looking forward to this new chapter in her life as a single mom," so it sounds like the daddy remains at bay, at least for now. Congratulations to both mom and baby!