updated 09/16/2009 AT 11:25 AM ET
•originally published 09/16/2009 AT 12:05 PM ET
Emmy-nominated actress Leelee Sobieski and her fashion designer fiancé Adam Kimmel are poised for first-time parenthood, a rep for the Joan of Arc star confirms to PEOPLE.
The “thrilled” couple – who announced their engagement in June – are expecting the baby in December.
Sobieski, 27, has modeled for Kimmel’s Fall/Winter 2009 look book, and most recently appeared in this summer’s Public Enemies alongside Johnny Depp; She can next be seen in The Mad Cow opposite Jeffrey Tambor.
Reporting by LISA INGRASSIA