Veteran comedy showrunner Marsh McCall died suddenly this morning of natural causes. He was 52, just weeks away from his 53th birthday. McCall, who was beloved in the creative community and remembered as a true gentleman, was working as co-executive producer on Netflix’s popular comedy series Fuller House at the time of his death.

McCall started as a staff writer and then head writer on Late Night with Conan O’Brien before segueing to primetime. He got his break on the NBC comedy series Just Shoot Me!, which he joined after the pilot and worked on for five seasons, rising to executive producer. McCall was mourned today by Just Shoot Me! creator/executive producer Steve Levitan.

McCall co-created two series, My Big Fat Greek Life for CBS, co-created by and starring Nia Vardalos, and Twenty Good Years for NBC, starring John Lithgow and Jeffrey Tambor.

McCall, who also performed in a rock band, served as executive producer on ABC’s long-running comedy series Last Man Standing and most recently as co-executive producer on Netflix’s Fuller House, a sequel to the ABC sitcom Full House.

“Our Fuller House family is heartbroken over the sudden passing of our co-executive producer Marsh McCall,” the series creator/executive producer Jeff Franklin said. “He was our brightest shining star, always smiling, and always there with the perfect joke. Beyond his immense talent, he was the happiest comedy writer we’ve seen, and his love of life was contagious. We will miss him dearly, and our hearts go out to his beautiful family and a universe of friends who adored him.”