Most probably know Domhnall Gleeson for two things: playing Bill Weasley in the "Harry Potter" series, and his back facing the camera in the only photo yet released of the latest "Star Wars" cast together.

Gleeson stopped by HuffPost Live on Thursday to chat about his new movie, "Frank," which co-stars Michael Fassbender and comes out Aug. 15. Gleeson, who has been cast in the upcoming "Star Wars: Episode VII," said all he could about the film -- which isn't much.

"I get sick in my mouth every time someone brings up 'Star Wars.' I'm so nervous I'm going to give something away. I just get a faraway look in my eyes and try to remain calm," Gleeson told host Ricky Camilleri with a laugh. "You sign a massive, big, long contract thing ... and then they send you a one-page thing that says, 'Here is what you're allowed to talk about.' And then there's just a big empty page. It says you're allowed to say you're excited to be in the movie. That's it."

J.J. Abrams is set to direct the film, which will hit theaters Dec. 18, 2015.

Catch the rest of Gleeson's precious few "Star Wars" tidbits above, and watch the entire HuffPost Live conversation here.

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