Tori Spelling has announced she is pregnant with her fourth child.

Tori Spelling, 38, who is married to Dean McDermott, announced the happy news on her Twitter account today.

The former Beverly Hills 90210 star posted a message saying: “Our family has some exciting and life changing news to share,” which linked to her website.

Tori Spelling wrote: “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.”

The actress also posted a picture of her bump with her children’s hands resting on top of it.

Tori Spelling has announced she is pregnant with her fourth child

Tori Spelling has fallen pregnant just five months after giving birth to Hattie.

Given that couples normally wait to the three-month mark before announcing the happy news it is likely she fell pregnant in December after welcoming her third child in October.

In April 2011, Tori Spelling and Dean McDermott, who married in 2006, took to Twitter to announce they were expecting their third child.

After giving birth to Hattie, Tori Spelling spoke of her desire to have a large family.

She revealed: “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.”

Dean Mcdermott, 46, added: “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.”