Stella Doreen McDermott was born Monday, Spelling's representative confirmed to People.com.
Spelling and her husband Dean McDermott are also the parents of 1-year-old Liam Aaron and McDermott has a 9-year-old son, Jack, from a previous marriage.
"I've always wanted a little girl since I'm such a girly girly," Spelling previously told People.com. "I immediately started crying (when I found out.) I couldn't believe it. I have my beautiful little boy and now I'll have my little girl! It's amazing."
Spelling is set to play a recurring role on The CW's "90210," a spinoff of "Beverly Hills, 90210," the 1990s teen soap on which Spelling began her acting career. She will reprise her role of Donna Martin from the original show.
Spelling and McDermott also are working on the third season of their Oxygen reality series, "Tori & Dean: Home Sweet Hollywood."