Tori Spelling is officially a mom-of-five!

The 43-year-old actress and her husband, Dean McDermott, welcomed a baby boy named Beau Dean McDermott on Tuesday, March 2, Tori confirmed via Twitter.

MORE: Pregnant Kailyn Lowry Reveals More Baby Name Ideas on Snapchat!

"We are so excited to announce the birth of the newest member of the McDermott family! Please join us in welcoming Beau Dean McDermott," she wrote on the microblogging site beside a sweet, black and white photo of Dean holding Beau's tiny hand.

According to People, Beau was born at 1:48 p.m., weighed 5 lbs., 12 oz. and measured 18.5 inches long.

"We are over the moon in love with baby Beau. He is a true blessing and his brothers and sisters were overjoyed to meet him! We are all truly grateful for our big beautiful and healthy family," Tori said in a statement to the entertainment news outlet.

MORE: Is Leah Messer Pregnant? ‘Teen Mom 2’ Star Sparks Baby Rumors!

Tori and Dean — who tied the knot in May 2006 — are already parents to kids Liam Aaron McDermott, 9, Stella Doreen McDermott, 8, Hattie Margaret McDermott, 5, and Finn Davey McDermott, 4. The 50-year-old actor is additionally a father to an 18-year-old son, Jack Montgomery McDermott, from his first marriage to Mary Jo Eustace.

The celebrity couple previously revealed they were expecting Baby No. 5 in October 2016. "It was a total surprise,” the former Beverly Hills, 90210 star said at the time. "But we always wanted a big family. I’m really excited."

MORE: Did Tori Spelling Dye Her Kids' Hair Again? See the Instagram Photo!

"For the first time this year, [all of our kids are] in school. So it’s like, wow. We’re basically starting over," she added. “Nothing is ever perfect, but I’m so madly in love with my husband and with our kids. The idea of adding to that is such a blessing."

Congrats to Tori and Dean on their adorable new addition!

For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube!