Mad Men star January Jones is continuing to keep the identity of her baby's father a secret - she's left the name off her son's birth certificate.
The actress welcomed baby Xander Dane Jones earlier this month (Sep11), but she has so far refused to reveal who fathered the tot.
And Jones seems intent on keeping the dad's identity a secret, according to documents filed at Los Angeles' County Department of Public Health.
On the birth certificate, obtained by Tmz.com, the star has left a blank space in the section asking for the father's name.