Tori Spelling and husband Dean McDermott welcomed their new daughter, Hattie Margaret on Monday.
The couple made the announcement on their Twitter page, saying, "Our family's so happy 2 announce tht 10/10/11 R baby girl Hattie Margaret McDermott was born at 7:08am!"
They also posted a picture of the baby's feet.
Spelling and McDermott, 44, have a son Liam, 4, and a daughter Stella, 2. McDermott also has a son named Jack, 12, from his previous marriage.
Last month, the former "Beverly Hills, 90210" actress celebrated her baby shower with the "Celebrity Moms Club."
The 38-year-old invited friends to an outdoor Malibu party. Guests included Alison Sweeney, Ali Landry, Lisa Rinna, Denise Richards, Brooke Burke-Charvet and "Real Housewives of Beverly Hills" star Kyle Richards.