AceShowbiz - HBO released the first trailer for an upcoming documentary about Robin Williams on June 7. "Robin Williams: Come Inside My Mind" offers a look at the journey of the iconic comedian from his extraordinary life and career, until his death by suicide in 2014. Directed by Marina Zenovich, the documentary is described as "a funny, intimate, and heartbreaking portrait of one of the world's most beloved and inventive comedian."

The documentary features never-before-seen footage and interviews with Williams' friends such as fellow comedian and actor Steve Martin, Whoopi Goldberg, Billy Crystal, Eric Idle, Pam Dawber, Zak Williams and former NBC host David Letterman. Meanwhile, Williams himself is the narrator of the documentary.

In the trailer, the "Good Will Hunting" star can be seen performing comedy sets at various times throughout his career and he can be heard narrating along the footage. "Stand-up is survival. For me, that's jazz, that's what I have to do," he says. The trailer also sees Williams opening up about his fear of abandonment that stemmed from his childhood. Some clips show childhood pictures of the comedian and his family.

"My father didn't always feel like he was succeeding, but he was the most successful person I know," said Zak Williams, the comedian's son.

The trailer reveals that there will be a discussion of Williams' drug use and voicemails he left for his friends. The footage shows that he admitted that he struggled with a "fear sometimes to run away from it all, sometimes to run into it all."

Steve Martin claimed that he witnessed Williams' struggle. "The Pink Panther" actor then revealed his comedian friend's true condition in the video. "On stage, he was the master, he was really comfortable on stage. Off stage, I just felt he was holding himself together," he said.

Produced by Alex Gibney and Shirel Kozak, the documentary heads to HBO on July 16.