Tori Spelling is pregnant with her fourth child.

The former Beverly Hills 90210 star has announced she is expecting another baby with husband Dean McDermott, which will be a little brother or sister for Liam, five, Stella, three, and five-month-old Hattie.

"Dean, Liam, Stella, Hattie, and I are beyond thrilled to announce that another little McDermott is on the way! We feel truly blessed that another angel has found us. Love, Tori xoxo," she said, writing on her website.

Tori - who married Dean in May 2006 - has made no secret of her desire to have a large family and said soon after Hattie's birth that she wanted another one. "People say, 'Oh my God, it's utter chaos after two.' But it's not, it's great. You lost your mind after the second one, so the third fourth and fifth, it's like you're so far gone, it's just kind of the same," the 38 year-old reality star said.

"As soon as I saw it was positive and it was a pregnancy, we both thought we need to have a fourth - at the same time," Dean, 46, added.