Landry, 37, is expecting the child in the fall and her 3-year-old daughter Estela is reportedly very excited for a sibling.
Landry and Monteverde got married in April 2006 after meeting at Bible study. Landry appeared in her husband's 2006 film "Bella," which he also wrote and produced.
"Thank you everyone for all o the well wishes!" Landry wrote on Twitter. "I have been dying to tell you all but wanted to make sure everything was ok with the baby first."
Landry was previously married to "Saved by the Bell" actor Mario Lopez in 2004, but they broke up seven weeks after their April wedding.