Phil Lesh, the bass player who co-founded the legendary rock band Grateful Dead, died on Friday. He was 84.

Lesh’s death was announced in a statement posted on his official Instagram account.

“Phil Lesh, bassist and founding member of the Grateful Dead, passed peacefully this morning,” the statement shared on Friday read. “He was surrounded by his family and full of love. Phil brought immense joy to everyone around him and leaves behind a legacy of music and love. We request that you respect the Lesh family’s privacy at this time.”

The post did mention his cause of death.

Lesh’s passing comes just two days after the Recording Academy named Grateful Dead as the 2025 MusiCares Persons of the Year.

In addition to Lesh, his surviving co-founders Bob Weir, Mickey Hart, Bill Kreutzmann and the late Jerry Garcia were chosen as honorees in recognition of their philanthropy and cultural impact.

The Grateful Dead will be honored at the 34th annual Persons of the Year benefit gala at the Los Angeles Convention Center on Jan. 31, two nights before the Grammy Awards, as the band approaches its 60th anniversary.

The oldest member of the Grateful Dead, Lesh was born on March 15, 1940, in Berkeley, California. He grew up playing viola and trumpet in school before trying his hand at composing. He was admitted to UC Berkeley but dropped out during his first semester. Lesh met Garcia at a house party in 1959. In his 2005 memoir, he said he was led to that fortuitous encounter “as if by an unseen hand.”

They met again in 1964 when Lesh attended a performance by Garcia’s band, the Warlocks. After the show, Garcia asked Lesh to join the band as a bassist. Lesh had never played the bass guitar before. Garcia then asked, “Didn’t you used to play violin?” After Lesh said, “Yes,” Garcia responded, “There you go, man.”

In 1965, Lesh performed with the Warlocks for the first time. In addition to gaining a new member, the band also got a new name: Grateful Dead.

Lesh was instrumental in creating Grateful Dead’s iconic sound and onstage gravitas. “When Phil’s happening, the band’s happening,” Garcia once said of Lesh’s prowess.

“Lesh is one of the most skilled bassists you’ll ever hear in subtlety and invention,” Bob Dylan wrote in his 2022 book, “The Philosophy of Modern Song.” “

The Grateful Dead name was retired in 1995 after Garcia’s death. “Jerry was the hub,” Lesh told Rolling Stone. “We were the spokes. And the music was the tread on the wheel.”

But Lesh continued to keep the Dead alive, touring with former band members in various iterations, including “Further” and “The Dead” for several years. The surviving founding members last all played together in a series of “Fare Thee Well” concerts celebrating Grateful Dead’s 50th anniversary in 2015.

“Today we lost a brother,” Weir, Hart and Kreutzmann, the three original band members who survive, said in a statement. “Phil Lesh was irreplaceable. In one note from the Phil Zone, you could hear and feel the world being born. His bass flowed like a river would flow. It went where the muse took it. He was an explorer of inner and outer space who just happened to play bass. He was a circumnavigator of formerly unknown musical worlds. And more.”

Lesh also performed under the moniker Phil Lesh and Friends, bringing on a host of rock stars across generations to guest perform with him. Lesh’s final concerts in the New York area were at the Capital Theater in Portchester, N.Y., in March, where a five-night run culminated with his 100^th show at the historic venue since it reopened in 2012.

The Empire State Building shined tie-dye colors from 9 p.m. to 10 p.m. Friday to honor Lesh’s legacy.