Lincoln has a new baby sister.
The couple, who married last October, are already parents to daughter Lincoln, born March 2013.
In typical sarcastic fashion, the "Veronica Mars" star commented on her pregnancy this summer.
"Having a cold while being pregnant is like getting a parking ticket while you’re at the dentist," she tweeted.
When the couple announced they were expecting again this past June, their rep said, "The whole family is beyond excited."
Bell, 34, and Shepard, 39, were married in Beverly Hills in a modest way at the clerk's office on Oct. 17, 2013. The two began dating in 2007.