Tori Spelling and husband Dean McDermott welcome their third child

The former Beverly Hills 90210 star welcomed daughter Hattie Margaret McDermott on Monday.

“Our family’s so happy 2 announce [that on] 10/10/11 [our] baby girl Hattie Margaret McDermott was born at 7:08am ! Xoxo,” she Tweeted, along with a photo of her daughter’s tiny feet.

Spelling, 38, and McDermott, 44, who have two children together, Liam, 4, and Stella, 3, chose to keep baby’s sex a surprise until birth.

“We thought it would be the ultimate surprise,” McDermott told Life & Style. “How many times can you get a surprise like this?”

Tori announced her pregnancy in April and recently told People she would love to have four kids.