Acting coach John Kirby, who worked with numerous celebrities and was an influential figure in Hollywood acting circles, has died at age 75. Multiple outlets report that Kirby died Wednesday, about three years after he was diagnosed with amyotrophic lateral sclerosis (ALS). Variety and Times of India both describe his long career in acting and coaching, highlighting his role in mentoring performers and helping shape careers. Variety reports that Nathan Nesbitt, Kirby’s acting studio manager and assistant of 22 years, confirmed the death on Instagram, describing Kirby’s passing in a personal message. Times of India adds that tributes have come from friends and celebrities, reflecting on his mentorship and the impact he had on the industry. The reports characterize Kirby’s final years as marked by his confrontation with ALS, with accounts noting how he faced the illness. No cause beyond ALS is specified in the available summaries, and no details about funeral arrangements are included in the provided excerpts.