Spencer Pratt Leaked Lauren Conrad Sex-Tape Story: She Is a “Cold-Hearted Killer”

Spencer Pratt and Lauren Conrad
In a fascinating new interview, Spencer Pratt confirmed that he was the one to leak the story about Lauren Conrad's alleged sex tape, and ripped his former Hills costar as a "cold-hearted killer" -- get all the details here. Jason LaVeris/FilmMagic; RB/Bauer-Griffin/GC Images

The rest is… still unwritten! MTV's The Hills stars Heidi Montag and Spencer Pratt gave a no-holds-barred interview to Complex, revealing that their feud with former friend Lauren Conrad endures to this day.

In 2008, rumors circulated that Conrad, 29, allegedly had a sex tape with her then-boyfriend Jason Wahler. The story, which Conrad denied, prompted her to yell at Montag — in one of the Hills' most defining moments — "You know what you did!" Only it wasn't Montag who started the sex-tape rumor — it was her future husband, Pratt.

"Today, I would be like, ‘Bitch, you know what you did,'" Montag, 29, told Complex. Both she and her husband relentlessly maintain, to this day, that Conrad's alleged sex tape exists.

"Lauren is a cold-hearted killer," Pratt, 32, added to the mag. "That’s what people don’t get. She will cut you in your sleep. She tried to destroy us. If you want to throw missiles, I’m throwing a nuke. This is how I operate."

Pratt also blamed Conrad, now married to William Tell, for creating a rift in his immediate family. In fact, he claims it's because of her that he isn't speaking with his mom or his sister, Stephanie Pratt.

"My mom’s a Lauren supporter," he dished. "She’s like, ‘Mark Cuban says on Shark Tank that you shouldn’t help your kids.’ I’m like, ‘Mark Cuban can go jump off a freaking cliff for all I care.'"

In a February 2015 episode of Marriage Boot Camp, Montag had a cathartic moment during which she wept about her former friendship. “I was the best friend you’ve ever had,” Montag said during the weepy episode.

Heidi Montag and Lauren Conrad in 2006
Heidi Montag and Lauren Conrad in 2006 Jamie McCarthy/WireImage.com

“Lauren, I forgive you for being so insecure in your life and so frustrated for everything that you went through that you felt like you had to blame it on me because that was easier. I forgive you for trying to ruin my life.”

Heidi Montag and Spencer Pratt in 2007
Heidi Montag and Spencer Pratt in 2007 John Shearer/WireImage.com

Pratt and Montag aren't the only ones to spill secrets about their days on The Hills. Conrad, in her October 2015 Cosmopolitan cover story, shared why her former faux-boyfriend Brody Jenner was the perfect fit for his radio show, Sex with Brody.

"He has a lot of experience," Conrad quipped of Caitlyn Jenner's son, 32. "… so sure, depending on what kind of advice you want."

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!