10/23/2007 AT 08:50 PM EDT
Gretchen Mol and her husband, director Tod Williams, are parents of a son.
Ptolemy John Williams was born Sept. 10, the actress's rep says.
Mol, 34, who starred in 2005's The Notorious Betty Page
, most recently appeared in the Russell Crowe western 3:10 to Yuma
and the comedy The Ten
At The Ten
last July, she said she and Williams, 38, who directed The Door in the Floor
, had recently moved back to New York. "I wanted to have a New York baby," she said.