'27 Dresses' star Katherine Heigl is pregnant

27 Dresses star Katherine Heigl and husband Josh Kelley are expecting their third child, a boy, in January.

The stars, who already have two adopted daughters, are thrilled with the new addition to their family, reported People magazine.

Their son will join big sisters Adelaide Marie Hope, 4, and Naleigh Moon, 7.

"The Kelley clan is thrilled to announce that we are expecting a third addition to our family. Naleigh and Adelaide could not be more excited to welcome their new sibling into the fold and Josh and I are overflowing with joy and gratitude. This is an incredibly exciting time for us filled with hope, anticipation, and hormones. Well, only I'm filled with hormones, but everyone in the family gets to enjoy them,'' says Katherine.