Find Out Which 'Pretty Little Liars' Star Found the Show's Theme Song (Exclusive Video)

The secret’s out on the origins of the Pretty Little Liars theme song, and everyone has one Liar to thank for the haunting track.

In The Hollywood Reporter's exclusive video from Tuesday's upcoming special, Pretty Little Liars: 5 Years Forward, Troian Bellisario (Spencer Hastings) reveals that Ashley Benson (Hanna Marin) discovered The Pierces’ “Secret” late one night while filming season one and immediately played it for the entire cast.

“I remember we got into the van and you pulled up your phone and you were like, ‘I have an idea for the show's theme song!’” Bellisario recalls. “And we listened to it and were like, ‘Mar [creator I. Marlene King], you have to hear this,’ and it was our theme song.”

Adds King: “People think that song was written for our show — it’s so perfect.” 

Well, looks like that secret’s out. Watch the exclusive clip above now.

Pretty Little Liars: 5 Years Forward airs Tuesday at 8 p.m. on ABC Family.