Exclusive: Jen's First Screen Test -- Exposed!

Back in the early Nineties, prior to fame and fortune, it was a killer green elf -- and not the paparazzi -- that was chasing Jennifer Aniston around. Jen made her feature film debut in the low budget horror movie "Leprechaun" and TMZ has uncovered her screen test and behind-the-scenes footage from the set of the 1993 film (shot in 1991). Jen is raw and uncensored as she spits gum into writer/director Mark Jones' hand.

But despite not being a seasoned actress at the time, we're told Jen behaved like a real pro. Aniston endured freezing cold temperatures while dressed in shorts that were anything but hot -- in every sense of the word. She also suffered a sprained ankle but took it all in stride and didn't complain.

"Leprechaun" also supersedes "the Rachel" as the scariest thing Jennifer Aniston has ever been in. A year after the film's release Jen skyrocketed to fame on "Friends" and the rest, as they say, is Hollywood history.

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