Universal Studios Hollywood's Halloween Horror Nights, reunited over the weekend Mandy Moore and Wilmer Valderrama, while enjoying the haunts. They dated in 2000 to 2002, and it's been 15 years since.

In January, Moore separated from husband of six years Ryan Adams, she shared two pictures via Instagram. In one caption, she wrote, "At the Psycho house at #universalhhn w the crew including @emilyschuman, @wilmervalderrama and a hidden @rp1313. Quite the Sunday evening...."

With Wilmer's girlfriend Demi Lovato in NYC and Mandy's rumored beau Taylor Goldsmith in Australia, the two exes joined a group of friends for a visit to Universal Studios Hollywood's Halloween Horror Nights.

In 2000, Moore and Valderrama began dating after meeting on the set of a photo shoot, both's careers were still on the rise then.

Valderrama told Howard Stern(an American radio and television personality, producer, author, actor, and photographer) in 2006 that he'd taken Moore's virginity.

"The sex with Mandy was good, but it wasn't like warm apple pie," he said at the time.

Moore responded to Valderrama's claim in Elle that year, explaining that her ex-boyfriend's remark was "utterly tacky, not even true and it hurt my feelings because I like him."

That same year, the brown-haired beauty reacted to his remark saying that it was, "utterly tacky, not even true and it hurt my feelings because I like him."

Months later, Valderrama told The Los Angeles Times, "This is what I have to say about the Howard Stern thing. When you go on Howard you are in his home. And I allowed myself to be very playful about a lot of subjects and topics. Eventually such topics were paired up with certain names...Obviously, we know the media loves to get a little confirmation of a story line, and that is all they needed and they ran with it. I don't really have a real opinion about it anymore. I am so past it already."

It seems both Valderrama and Moore are past the tragedy.

The That 70's Show star is currently dating Demi and the singer is rumored to be dating musician, Taylor Goldsmith.