The 90210 star is expecting her third child with her husband Dean McDermott and the couple are overjoyed with the news.
Writing on their joint twitter page, Tori tweeted: "I know there's been a lot of speculation, so I wanted everyone to hear from me. it's official. Dean & I are PREGNANT!!!! (sic)"
The 37-year-old blonde actress and actor Dean, 44, already have son Liam, four, and two-year-old daughter Stella.
The couple have been married for almost five years and are currently starring in reality TV show sTORIbook Weddings, in which they give advice and help to couples about to tie the knot.
Tori - the daughter of late TV and film producer Aaron Spelling, whose productions include Dynasty and Melrose Place - has made no secret of her desire to have another child.
She previously said: "We have our perfect family - a little boy and now a girl, so we're blessed. But we love having babies so I will have more."
- BANG! Showbiz