Tori Spelling has given birth to her fourth child.

The former Beverly Hills, 90210 star and her husband Dean McDermott welcomed a baby boy, Finn Davey McDermott, on Thursday.

Spelling took to Twitter.com to announce the happy news, writing, "It's a boy!", along with a link to her website, which displayed a snap of the newborn's hand grabbing his mom's finger.

Little Finn joins siblings Liam, five, Stella, four, and one-year-old Hattie.