"There were always a lot of secrets", one Houston pal says in the new trailer.
Unlike previous films about the pop icon, the documentary was made with the approval and participation of Houston's family. "He wanted to be in the forefront, and eventually she stepped down to lift him up".
Directed by Kevin Macdonald (The Last King of Scotland), Whitney is produced by Simon Chinn, Jonathan Chinn, and Lisa Erspamer, and executive produced by Nicole David, Pat Houston, Will Clarke, Andy Mayson, Mike Runagall, Zanne Devine, Rosanne Korenberg and Joe Patrick.
The film will also highlight Houston's relationship with her mother who was admittedly tough on her superstar daughter.
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The trailer shows the seven-time Grammy victor opening up about the ugly side of celebrity ("People think it's easy, but it's not") and trash-talking fellow singer Paula Abdul ("That girl is singing off-key on the record"). But then I did two things.
Dee Dee Warwick (born Delia Mae Warrick) was the niece of Houston's mother, Cissy Houston, and the younger sister of veteran soul star Dionne Warwick. And she said to me, "I just don't understand what happened, she was the most lovely girl, ' and this was someone who knew her really well".
"So I think it was the combination of thinking there's this really interesting personal mystery, but also how this woman was a musical genius", Macdonald continued.
The film, which will make its theatrical debut on July 6, incorporates features like never-before-seen archival footage and rare performances to wrap viewers into Houston's life.