Bob Dylan is mourning his friend Garth Hudson. On Monday, the musician posted a tribute to the Band keyboardist on X, remembering him as the group’s “driving force.”

The longtime keyboardist and organist of The Band, Garth Hudson passed away in January at the age of 87.

Garth Hudson, who played organ, accordion, saxophone, and more as a member of the Band—perhaps still the group that best embodies the glorious, lawless amalgamation of styles at the very heart of rock and roll—died at the age of eighty-seven,

Garth Hudson, the Band’s virtuoso keyboardist and all-around musician, has died at age 87. Hudson, the eldest and last survivor of the group which once backed Bob Dylan, has died at age 87.

Bob Dylan has returned to his favorite social-media cesspool of choice, X, not to review a trio of SNL curveballs from a certain young admirer but to instead memorialize a recently deceased friend and collaborator.