Tori Spelling welcomes third child

Tori Spelling and Dean McDermott have two other children together.

STORY HIGHLIGHTS

• The actress shared a photo of her daughter's feet


• They decided to keep the baby's sex a delivery surprise


• Spelling said in September that this pregnancy might be her last

() -- It's a girl for Tori Spelling and Dean McDermott!

"Our family's so happy 2 announce [that on] 10/10/11 [our] baby girl Hattie Margaret McDermott was born at 7:08am! Xoxo," the actress, 38, Tweeted, sharing a photo of her daughter's feet.

Early on, they decided to keep the baby's sex .

and McDermott have together, Stella, 3, and Liam, 4. McDermott also has a 13-year-old son, Jack, from a previous marriage.

After announcing she was pregnant in April, Spelling told PEOPLE she and McDermott would love to have four kids, but said in September that this pregnancy might be her last.