The Glee star admits she has "heard a rumour" the show's creator Ryan Murphy is in talks with a "male pop star" to join the cast of the horror comedy, and she is convinced the mystery man is Harry.

The One Direction star is set to take a break from pop as the band embarks on a hiatus and it has long been thought Harry would pursue an acting career during this time off, and Lea hopes she will finally get to work with her celebrity crush.

"I also heard a rumor that he (Harry) may (join the show)," she tells InStyle magazine. "I don't know if this is true, but he (Ryan) said at a press thing recently that he is talking to a male pop star to come for next year... If it's Harry Styles, everybody better calm down,... I love One Direction. Everybody knows this."

Lea is also adamant Harry would be a good choice for the upcoming movie version of hit stage show Wicked, adding, "I'm also thinking that he should be in the Wicked movie. He's our modern day Mick Jagger."

Harry has previously received the backing of Hollywood movie mogul Harvey Weinstein, who is convinced the singer has a bright future in the acting industry.

"Harry Styles will definitely be a movie star if he wants to..." Harvey told Britain's The Sun newspaper, before joking, "First he's got to date all three of my daughters. They all think he is extremely handsome. Once that's sorted, he can be in any film he wants."

Harvey later revealed Harry had turned down a role in movie Tulip Fever, opposite Judi Dench, Christoph Waltz and Zach Galifianakis, adding to "I'm sure Harry won't be turning be down the next role I offer him... (He is) like Errol Flynn - he's got that swashbuckling charm."