January Jones, new mom, at the “X-Men: First Class” premiere this year. (Peter Kramer/ASSOCIATED PRESS)

The actress — who plays Betty Draper, mother of three, on “Mad Men” — gave birth to her son on Tuesday, People reports. His name: Xander Dane Jones.

Jones, 33, confirmed her pregnancy in April but did not reveal the father’s identity.

The “X-Men: First Class” star reportedly plans to raise the child as a single mom.

E! reported over the weekend, pre-arrival of Xander, that Jones was not confirmed to attend this Sunday’s Emmy Awards or any of the associated parties. Presumably she’ll be sitting it out this year, spending time with her new bundle of joy.