Tori Spelling is expecting a baby boy.

The 43-year-old actress and her husband Dean McDermott - who already have children Liam, nine, Stella, eight, Hattie, five, and Finn, four, together - announced they have another son on the way by decorating their Christmas tree with blue tinsel and baubles and placing a pair of turquoise booties in the centre alongside their ultrasound picture.

In a video recorded by E! News, Tori said: ''With Liam and Stella, we found out at the doctor's office. Hattie and Finn we didn't find out until they were born.

''So this is the first reveal. We really wanted to do it with the kids because they were so excited and we wanted to do it as a family.''

The family then turned to stand in front of the heavily-decorated tree as the former 'Beverly Hills 90210' star confirmed that she and her spouse are having another son.

She said: ''It's a tie-breaker - boys win! We're just going to have to have one more.''

The couple - who got married in 2006 and renewed their vows in 2010 - announced they were expecting their fifth child two months ago and admitted it was a ''surprise.''

Tori said: ''It was a total surprise. But we always wanted a big family. I'm really excited. This baby happened at the best time. 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.''

The blonde beauty suffered placenta praevia while she was pregnant with Finn, causing problems with delivery as the condition means the neck of the uterus is blocked by the placenta, but she can now breathe a sigh of relief because doctors have told her that she won't experience the same issues this time round.

She said recently: ''I'm totally healthy and safe. I am 100 percent healthy!

''The condition I had with my last pregnancy, the baby and I got checked out when we first found out and not only does it not exist but it cannot exist. So we are going to have a happy and healthy pregnancy together!''

She's also been enjoying tucking into doughnuts - her predominant craving this time around - because she's not worried about gaining any weight.

She explained: ''I am not working out at all. I always say this, I have four kids and it's the biggest work out of anyone's life!

''I literally am up at 6am with the kids, I do not do my thing and settle in bed until nine at night. Literally I don't sit down.''