From mysterious Rosewood occurrences to dark arts in Harry Potter's wizarding world, Pretty Little Liars and Harry Potter seem like two totally different worlds entirely. Well these two worlds are about to combine! Well… sort of.

Pretty Little Liars' Lucy Hale stars alongside Harry Potter's Freddie Stroma in A Cinderella Story: Once Upon a Song. So what did Lucy think of Freddie the first time she met him? "I thought, 'Wow! He needs to be in a hair commercial,'" Lucy says.

SEE IT: J-14 Video: On the Set of Pretty Little Liars

Check out the behind the scenes video of A Cinderella Story: Once Upon a Song below:

Are you excited for A Cinderella Story: Once Upon a Song?

Photo: Courtesy of ABC Family

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