"We are so excited to announce the birth of the newest member of the McDermott family!" said the Craft Wars star.
"It's a boy!!!!"
Tori has three other children with 44-year-old McDermott: Liam, 5, Stella, 4, and Hattie, 10 months. Dean also has a 13-year-old son named Jack from a prior marriage.
"We've been blessed with another angel," Dean tweeted.