Tori Spelling Baby #4: Welcomes Son Finn Davey

"90210" actress-turned-author and reality star Tori Spelling celebrated the birth of a baby boy on Thursday, Aug. 30 with hubby Dean McDermott. When Spelling's baby bump began to show just a few months after the birth of her now 10-month old daughter Hattie, the couple announced it would be their fourth (and last) child. Finn Davey arrived at 5:39 p.m. weighing in at 6 lbs., 6 oz.

Davey joins older brother Liam (5) and two sisters Stella (4) and Hattie.

The 39-year-old daughter of the late film/television producer Aaron Spelling announced the happy news via Twitter and her official website in a post stating:

"It's a boy! We are so excited to announce the birth of the newest member of the McDermott family!"

After a brief marriage to actor and playwright Charlie Shanian, Spelling married McDermott in a private ceremony in May 2006. The couple invested in and operated a California-based bed and breakfast in 2007, which became the basis for the hit Oxygen network reality show, "Tori & Dean: Inn Love." The success of the show led to a number of other reality show kick-offs. Spelling has since released three autobiographical novels. The celebrity duo's first child, Liam Aaron, was born right before the premiere of "Tori & Dean: Inn Love" on March 13, 2007.

Although Spelling's mother Candy first announced that Finn Davey's initial due date was set for Sept. 20, she said he would probably arrive earlier since he was going to be born via a C-section.