TV bosses have moved swiftly to deny reports actress Hilary Duff has held up production on “Gossip Girl” with a number of demands.

The 21-year-old is currently in New York City filming episodes as a guest star on the hit TV teen drama, in which she plays a movie star who enrolls in a university with Vanessa, played by Jessica Szohr.

Rumors swirled that Duff had infuriated the show’s cast after refusing to leave her trailer as the others waited to film near Manhattan’s Gramercy Park neighborhood, causing a massive delay in shooting.

A source claims, “No one could believe they would actually hold up taping for her. Nobody in the cast behaves like that.”

But a representative for the show tells the New York Post’s gossip column Page Six the rumor is “absolutely not true.”

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