The 35-year-old actress is best known for her roles on TV's "Saved by the Bell," "Beverly Hills, 90210" and "White Collar."
She married artist and actor Brady Smith in 2005.
Usmagazine.com said their first baby is expected to be born next May. The report did not say if it is known whether the child is a boy or a girl.
Notable deaths of 2014 [PHOTOS]