The "Veep" actress and former "My Girl" co-star married Shaun So in 2008.
"I'm feeling pretty good so far," the 32-year-old actress told People.com about her pregnancy. "I was really lucky -- I did not have any morning sickness which was great because I was working."
Chlumsky did not say exactly when she is due or what the baby's gender is.
Celebrity Breakups and divorces of 2014 [PHOTOS]