Tori Spelling and her husband Dean McDermott shared photos of themselves interacting with their newborn son Finn Davey.

In the photo released Sept. 2, McDermott holds his son's head with one hand.

"So in love," Spelling captioned the photo.

In another image posted on Sept. 1, baby Finn's hand is gripping Spelling's finger.

"Finn Makes Four," Spelling wrote in the caption.

The husband and wife announced the arrival of their fourth child 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!!!" Spelling wrote. "We've been blessed with another angel," McDermott later 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. 

McDermott posted a letter he wrote before Finn's arrival to his blog:

"Well, it's the night before your entrance into this crazy, whacky, amazing world full of joy, good times, bad times, love, loss, friends and foes -- and that's just your brothers and sisters!" he joked.

"They're always full of love, laughter and energy. Quite frankly they're absolutely bonkers too, but you're going to love them," McDermott added. "Mom and Dad are a bit kooky too - that's just how we roll. Not to worry though, we'll grow on you after a while. So strap on your onesie, because it's going to be a wild ride."

The 39-year-old "Craft Wars" star shared the details of her fourth child's arrival on her blog. Finn arrived at 5:39 p.m., weighing 6 pounds, 6 ounces and measuring 20 inches long, according to her website.

Spelling married McDermott in May 2006. In addition to a slew of films through their individual careers, the couple have appeared in reality shows documenting their marriage, pregnancies and the birth of their first three children -"Tori & Dean: Inn Love" and "Tori & Dean: Home Sweet Hollywood" on the Oxygen network.