AceShowbiz - Actress Shay Mitchell is pregnant.

The "Pretty Little Liars" star announced she is expecting a baby with her longtime boyfriend, TV host Matte Babel, in a maternity video posted on her YouTube channel on Friday (June 28), when she showed off her bulging belly.

The clip was titled, "Guess Who's Preggers", and in the accompanying caption, she wrote, "There is something in the oven and it's not my pizza!!!"

"WOW ... It's kind of surreal processing the fact that another human is growing inside of you. It's exciting, nerve-racking, difficult and emotional all at the same time. Everyone waits for the right time to make the announcement and for me it wasn't until I couldn't hide it anymore and was tired of wearing over sized sweatshirts."

Shay continued, "We're beyond excited and looking forward to starting a family. I've learned so much about myself and parenthood over the past 6 months, and feel like I haven't even scratched the surface! It's going to be a wild ride!!"

The video features the 32-year-old posing for a topless photoshoot, wearing a pair of baggy black pants and boots, while it also shows Shay undergoing an ultrasound and discussing the rollercoaster of emotions she has experienced during her pregnancy.

The happy news comes six months after the actress revealed she had suffered a miscarriage last year (18).