It was only a matter of time, wasn't it?

Pretty Little Liars costume designer Mandi Line has confirmed to Entertainment Weekly that she has teamed with Aéropostale to come up with a fashion line based on this breakout ABC Family hit.

“It’s been a dream come true. It’s become such a passion project on both sides. All of us have become like family within the last three or four months,” Line told EW of the collaboration. “I’m so protective of the show and the fans, but the more I work with them, the more I see that they’re really open to everything I’m saying.”

She adds that no item in the clothing line will cost more than $72.

Line added that various items will be inspired by various characters, with The Pretty Little Liars Collection by Aéropostale hitting that brand's retail stores and website on January 5.

Pretty Little Liars Season 4 returns with new episodes two days later, and Line even offered up a tease regarding what fans fan expect when PLL comes back.

"Spencer is going to go through a transition that I wasn’t very happy with, but she redeems herself. There’s also an upcoming black and white [film noir style] episode and the fashion is unbelievable. It’s something that I don’t think I’ve ever seen on cable with a young, contemporary show. It looks like a movie."

To relive any of the best moments from Season 4 or any prior season to date, watch Pretty Little Liars online now.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.