"The whole family is over the moon about the arrival of their baby boy," Frye's representative said. "His big sisters, mom and dad are by his side."
The child, whose name has yet to be announced, was born Monday evening.
Frye, 37, is the former child star of the 1980s sitcom "Punky Brewster." She married film producer Jason Goldberg in 1998. They are the parents of daughters Jagger Joseph Blue, 5, and Poet Sienna Rose, 8.