Two of Hollywood's freshest and hottest young stars, Liam Hemsworth and Amber Heard, team up for a movie. But with Heard's suspicious reputation, should Miley Cyrus be worried about her fiancé?

Speculations start to build up when Amber Heard signed in to play Liam Hemsworth's love interest in the upcoming movie, "Paranoia." With recent rumors that involved Amber with the newly single Johnny Depp, Miley might be keeping her eye on her boy since she's been spotted around Philadelphia where the movie was being filmed.

But does Miley really have something to be worried about? While the stars earned some attention when they were shooting on the street, Amber looked less than impressed with the hunky Australian actor.

Heard and Hemsworth filmed a scene on busy street where the young actress can be seen climbing into a taxi. The two looked uninterested with each other, but that must be for the roles they portray.

Heard was casually dressed in a white button down and black pants. She also dyed her hair from golden blonde to a darker brown. The 22-year-old Hemsworth was dressed casually in a t-shirt and pants.

The movie, which also stars Gary Oldman and Harrison Ford, is about a boss who blackmails one of his employees to spy on a rival company. It is directed by Robert Luketic and will be released next year.

Liam's fiancée, Miley Cyrus, is also in Philadelphia to accompany her boyfriend while he's shooting. The young singer/actress has been frantically tweeting pictures of her new pixie haircut while she probably can't do a lot of things in Philly.

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