The Hills star Spencer Pratt has claimed on the live radio that girlfriend and sometime fiancee Heidi Montag is still a virgin.

Pratt was promoting the new season of the hit faux-reality TV show on Ryan Seacrest's morning show, when he cooed about Montag's supposed promise.

He told the radio host, "She's still a virgin...We don't sin over here," adding that he and Montag place pillows between them in bed at night - to help them fight temptation.

And the bombshells/lies didn't stop there.

Pratt went on to state his girlfriend is so religious, she's considering recording a Christian album.

But HollyScoop.com have unearthed footage from the first season of The Hills, when Montag has a heart-to-heart chat with Pratt after taking a pregnancy test.

The website asks, "Last we checked, if you're a virgin, you wouldn't need to take a pregnancy test."

Can you get pregnant from slobbering all over each other?...