They already have two daughters -- Jagger Joseph Blue, 5, and Poet Sienna Rose, 7, CBS News said.
"I have a very big announcement: We have a newest addition to the family here," Frye said on Thursday's edition of "Today," referring to her baby bump.
"We have two girls and now a new baby to join the family. We are so excited -- I'm so happy."
Frye, 37, is to release her new book "Let's Get This Party Started" Oct. 15 and she will serve as host of the OWN lifestyle program "Home Made Simple" later this year, CBS News said.
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