January Jones has given birth to a baby boy.

The 'X-Men: First Class' actress welcomed her first child on Tuesday (13.09.11) and has named him Xander Danes Jones.

A representative for January told People.com she and her son were "doing great".

The 33-year-old beauty has chosen not to reveal the father of the baby.

Recently January - who was spotted buying baby clothes for a girl while out on a shopping trip in Los Angeles - said she was enjoying a period of "nesting" at home preparing for the arrival.

She said: "I've been enjoying a nice break.

"I've been in a nesting phase just preparing my house and stuff. I've had the luxury of a couple months off."

However, she joked she was upset to have not had any unusual cravings.

She said: "I feel great. I haven't had any weird physical side effects. I feel pretty lucky so far.

"Everybody is asking if I've had any odd cravings. I haven't yet. It's a bummer. I wish I had something weird to tell."