January Jones, who has kept the identity of her baby daddy a secret since announcing her pregnancy in April 2011, has refused to reveal his identity once again.
According to Radar Online, the actress said that it's her son's business, and not the public's.
The New York Times mentioned Matthew Vaughn, her married 'X-Men: First Class' director, and Michael Fassbender, who co-starred in the film alongside her, as two rumored possible prospects of 20-month-old Xander's papas.
Vaughn, who is married to supermodel Claudia Schiffer, vehemently denied being the father, while Fassbender refused to comment on the allegations.
Jason Sudeikis, who Jones was dating up until January 2011, also denied being the father of her child.
