As of the time of writing, Robert's exact cause of death has not been shared by his family or friends. The star's passing was announced on Twitter by Larry Karaszewski, a member of the board of governors of the Academy of Motion Picture Arts and Sciences and a friend of Robert's.

"My good pal Bobby Morse has passed away at age 90," he wrote on the social media platform. "A huge talent and a beautiful spirit. Sending love to his son Charlie and daughter Allyn. Had so much fun hanging with Bobby over the years — filming The People v. O.J. Simpson and hosting so many screenings (How To Succeed, Loved One, That’s Life)."