The Sabrina the Teenage Witch star is four months along, her rep says. Hart and her husband Mark Wilkerson, who married in 2003, are already the proud parents of a son, Mason, who is nearly 2.

“I love the faces Mason makes. I could watch him forever,” Hart, 31, told shortly after his birth.

Baby No. 2 will be arriving a bit sooner than the actress planned. In an interview with Celebrity Baby Blog, Hart said, “I hope to have a little sibling for Mason sometime around his third birthday, but first I want him to learn how to snowboard – because I feel like that will be a marker of his self control!”

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dded Hart: “I adore my baby boy and can’t imagine not having him around. He makes everything okay, if I’ve had a bad day or a good one.”

Hart, who’s currently shooting a Lifetime movie in Vancouver, will next be seen in a guest appearance on the Oct. 9 episode of Law & Order: Special Victims Unit.