Announcing the news on Twitter on Thursday, the 35 year old posted, "Looks like (Donald) and I are going to have a little stormtrooper of our own!"
Cacee and Donald, who had been dating for over 6 years, recently got married in a secret ceremony. Perhaps a new baby had something to do with it?
The child will be the first for Cobb, but "Scrubs" star Faison has four kids from prior relationships.
Meanwhile, Cobb's best pal Jessica Simpson is also pregnant. She is expecting her second child with fiance Eric Johnson.