Robert Hall Weir is an American musician and songwriter best known as a founding member of the Grateful Dead. After the group disbanded in 1995, Weir performed with The Other Ones, later known as The Dead, together with other former members of the Grateful Dead. Weir also founded and played in several other bands during and after his career with the Grateful Dead, including Kingfish, the Bob Weir Band, Bobby and the Midnites, Scaring the Children, RatDog, and Furthur, which he co-led with former Grateful Dead bassist Phil Lesh. In 2015, Weir, along with former Grateful Dead members Mickey Hart and Bill Kreutzmann, joined with Grammy-winning singer/guitarist John Mayer, bassist Oteil Burbridge, and keyboardist Jeff Chimenti to form the band Dead & Company. Dead & Company's last performance occurred on 16 July 2023 at Oracle Park in San Francisco.

Grateful Dead was an American rock band formed in 1965 in Palo Alto, California. The band is known for its eclectic style, which fused elements of rock, blues, jazz, folk, country, bluegrass, rock and roll, gospel, reggae, and world music with psychedelia, the improvisation of their live performances, and its devoted fan base, known as "Deadheads". According to the musician and writer Lenny Kaye, the band's music "touches on ground that most other groups don't even know exists." For the range of their influences and the structure of their live performances, Grateful Dead are considered "the pioneering godfathers of the jam band world".