Reality stars Tori Spelling and her husband Dean McDermott announced the arrival of their fourth child. The former "90210" actress first delivered the news on Twitter on Thursday, Aug.30. "We are so excited to announce the birth of the newest member of the McDermott family!" It's a boy!!!" she wrote. "We've been blessed with another angel," McDermott also tweeted. Finn Davey is the newest addition to the couple's three other children: Liam, 5, Stella, 4, and Hattie, 10 months. Dean also has a 13-year-old son named Jack from his first marriage.