"Erin and I are thrilled and can't wait to meet our newest addition," Stanley said in an exclusive statement to People magazine. "We've been extremely blessed and we're excited to see what the future holds. I often joke that I've traded the Viper Room for the diaper room, and it looks like my tour's been extended!"
The baby is due this winter, People.com said.
The couple have been married for about three years and are the parents of Colin, who will be 2 next month.
Stanley also is the father of 14-year-old Evan, his son from a previous marriage.