Peter Jason, a character actor known for his roles in “Deadwood,” “48 Hrs.” and “Prince of Darkness,” along with his many television appearances, died Thursday in his West Hollywood home.

With a client list that includes Katy Perry, Chrissy Teigen, Olivia Culpo, Nikki Glaser and the entire Kardashian-Jenner family, Dr. Jason Diamond has long been one of Hollywood’s hottest docs.