Melissa Joan Hart Pregnant With Third Baby

American actress Melissa Joan Hart has announced she is expecting her third baby.

The former Sabrina the Teenage Witch and Clarissa Explains it All star announced her happy news on Twitter on her 36 birthday, by posing with husband Mark Wilkerson and sons Mason, six, and Braydon, four, showing off her already expanding tummy.

Melissa has always said she wants a large family. Speaking after the birth of Braydon, she said:

"We definitely want to add to our family. We're interested in adopting as well. We're just starting to explore that.

"Since I was little, I knew that I wanted to have children. I'm the oldest of eight kids, and I have always liked the idea of a big family."

Congratulations Melissa and Mark!