William Hasley, Screenwriter Who Co-Wrote Book With Caitlyn Jenner, Dies on Hollywood Hiking Trail

Jun 9, 2026 12:59pm PT William Hasley, Screenwriter Who Co-Wrote Book With Caitlyn Jenner, Dies on Hollywood Hiking Trail

By Pat Saperstein

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Pat Saperstein

Deputy Editor

@Variety_PatS

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The late William Hasley, left, with his former wife Robin Riker in 1986. Ron Galella Collection via Getty

William Hasley, a writer who worked on TV series including “The Smurfs” and co-wrote an inspirational book with Caitlyn Jenner, has been identified as the hiker who was found dead on Hollywood’s popular Runyon Canyon trail on Saturday evening. He was 78.

Hasley was previously married to “The Bold and the Beautiful” actress Robin Riker. His death comes just two weeks after a man in his 40s died of cardiac arrest on the same trail.

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