Leelee Sobieski Expecting Her First Baby!

Leelee Sobieski arrives at the Los Angeles Film Festival for the premiere of 'Public Enemies' in Los Angeles, California on June 23, 2009. Credit: ROBYN BECK/AFP/Getty Images

Leelee Sobieski and her fashion designer fiance, Adam Kimmel, are expecting their first child together, Usmagazine.com confirms.

See the baby bump all of fame!

"The happy couple are thrilled to be expecting their first child in December," the star's rep tells Us.

This will be the first child for both.

Usmagazine.com confirmed that the couple were engaged in June, when the star, 26, wore an engagement ring at the premiere of her latest film, Public Enemies.