JonesSuds460.jpgSaturday Night Live's Jason Sudeikis is not the father of January Jones baby, E! reports.

According to a source, the father is someone Jones met on set while filming X-Men: First Class. The timeline makes sense; filming began in January, and Jones announced her pregnancy in late April. She is now starting to show.

No word on whether Jones was involved with a cast member or someone behind the scenes, but her male co-stars in the movie include James McAvoy, Kevin Bacon, Michael Fassbender, Nicholas Hoult and Jason Flemyng.

Sudeikis was tongue-tied over Jones' pregnancy at the White House Correspondents' Dinner in early May; he and Jones broke up in January (they started dating in July 2010). When asked if he wanted to comment he said, "I’d rather ... yes but no," fueling speculation that he was the baby daddy.