The daughter of filmmaker Ron Howard married actor Seth Gabel in 2006. They have a 4-year-old son named Theo.
Howard is best known for her work in "The Village," "Lady in the Water," "Spider-Man 3" and "The Twilight Saga: Eclipse."
Gabel has appeared in "The United States of Tara" and "Fringe."
Us Weekly did not say when Howard is expected to give birth or what the baby's gender is.
Celebrity Couples of 2014 [PHOTOS]