The mystery of the identity of the father of January Jone's baby is deepening today after INSIDE EDITION obtained the birth certificate which had a blank space where the father's name should be.
It lists January Kristen Jones as the mother, but the father's name is intentionally left blank.
The beautiful star of Mad Men gave birth just days before the show won the Emmy as best drama for the fourth year in a row, and she was noticeably absent as the cast celebrated onstage.
Now speculation is building about the identity of the father.
Rumors have romantically linked Jones to the director of X-Men: First Class Matthew Vaughn, who happens to be married to supermodel Claudia Schiffer and denies being the baby's father.
Others rumored to be the father include Saturday Night Live star Jason Sudeikis, and actor Xander Berkeley, who shares the baby's first name and co-stars with Jones in the upcoming film Seeking Justice.
But for now, the identity of the father of Jones's baby is a blank.