Despite pledging to explore Ledger's family secrets and the feuding that has followed his death, producers of his E! True Hollywood Story have glossed over the drama in the final edit.

While the dramatised biographies usually dish dirt on celebrities, Ledger's family circle and industry friends closed ranks on a team of filmmakers who flew to his hometown of Perth last month to dig up more secrets.

Instead, the one-hour clippings job, which airs tomorrow night, features limited insights into his life and arms-length interviews with colleagues, including his Sweat co-star, Melissa Thomas and casting agent Ann Fay.

The final chapter of the drawn-out episode sees one of Ledger's last co-stars, Mini-Me actor Verne Troyer, breakdown in tears over his passing.

Troyer reveals details of the cold symptoms Ledger had been battling on the set of The Imaginarium of Doctor Parnassus just a week before his death by accidental overdose on January 22 this year. "You could tell he was sick. He looked exhausted," Troyer said.

A New York coroner found Ledger had died due to a likely mix of prescription medications treating insomnia, anxiety and pneumonia.

E! producer Dana Drake was quoted as saying they would be "open" to tackling the controversial areas of the actor's life, but avoided airing family in-fighting between his father Kim and his brothers.

 E!True Hollywood Story airs tonight in America.