Bill Murray is mourning the death of his eldest brother Ed, whose passing was announced Monday.

“It’s with the heaviest of hearts that we announce the passing of the legend Ed Murray,” began a message on the actor’s William Murray Golf apparel Instagram page.

Ed was named for the Murray family patriarch and is credited for introducing the clan to “this wonderful game of golf,” beginning at the age of 10 when he began caddying at the Indian Hills Country Club in Illinois.

The post also noted how Ed, the recipient of a special scholarship during his college days, served as the inspiration for one of the beloved characters in the 1980 comedy “Caddyshack.”

“Ed was the recipient of the Evans Scholarship back in 1963, while attending Northwestern University—a scholarship awarded to golf caddies—a family storyline which served as inspiration for the Danny Noonan character in ‘Caddyshack’ when Brian Doyle-Murray co-wrote that iconic screenplay,” the message noted.

“Ed and all five Murray brothers are members of the Caddie Hall of Fame, as well—something all the boys take pride in, as this game helped shape their lives,” the post added, a nod to the family’s 2015 induction.

The message also said Ed’s loss “is a hole that will never be filled.”

“Thank you for always being so gracious, Ed. Our hearts are with his lovely family,” the post concluded. “Rest in paradise, to a true family man and a gentle, sweet soul. May we honor your memory from this day forward.”

Bill Murray, 70, starred in “Caddyshack” as groundskeeper Carl Spackler, and Ed received a “special acknowledgment” in the end credits, according to USA Today.