'I Am Heath Ledger' Documentary -- Watch the Emotionally Charged First Trailer

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During his 28-year life, Heath Ledger had such an impact on those around him.

The first trailer for Spike TV's upcoming documentary, I Am Heath Ledger, features throwback footage of the Dark Knight star -- who died in 2008 due to accidental intoxication from prescription drugs -- paired with tear-jerking testimony from friends, family and filmmakers alike.

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"Before Brokeback Mountain came out, it would have been unthinkable to have a romantic tragedy involving two gay cowboys," Rogue One: A Star Wars Story star Ben Mendelsohn says. "This is one of the biggest heartthrobs on Earth, that's an artist."

"Even as a supporting actor, he will steal the whole show," Brokeback Mountain director Ang Lee recalls.

Watch the trailer below.

WATCH: Heath Ledger's Father Says Sister Warned Actor About Mixing Drugs

I Am Heath Ledger will screen at the Tribeca Film Festival on April 23, before premiering on Spike TV on May 17 at 10 p.m. ET/PT.

Watch the video below for more looking back at Ledger's life.

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