Tori Spelling admits to past flings with two 90210 costars (VIDEO)

Tori Spelling just admitted she slept with not one, but two of her Beverly Hills, 90210 costars — and a lie detector confirmed it!

The reality star is featured in a new special, Tori Spelling: Celebrity Lie Detector, and in a preview of the show obtained by TooFab she admits she had sex with two different male costars — but in the clip, we only get to hear who one of them is.

More: Tori Spelling’s found the love of her life, and she’s not letting him go

More: Fans react to Tori Spelling’s recent Instagram picture with sadness (PHOTO) 

Spelling said that the onscreen love affair between Donna Martin and David Silver, which for years remained chaste, was far from it in real life.

“I was a young girl, Brian [Austin Green] and I were the youngest, we were 16 and I remember the first time I shook his hand, I had that… I fancied him,” she said.

Spelling added that their relationship was more special than just sex, with him even calling her his “little lamb chop.”

More: Megan Fox, Brian Austin Green’s divorce details are pretty surprising

But the real bombshell comes when she admits she slept with another lead actor in the wildly popular series.

After working through the possibilities, the host narrows it down to the show’s biggest heartthrobs: Jason Priestley and Luke Perry. But the preview cuts off before we can hear who it was! To find out, you’ll have to watch Tori Spelling: Celebrity Lie Detector on Saturday, Oct. 3 at 10 p.m. on Lifetime.