Effective period / Period of releases: 1968 - 2022

Members: Mickey Finn (3), Mark Feld, Steve Peregrin Took

After leaving John's Children in 1967, Marc Bolan forms the acoustic duo Tyrannosaurus Rex with percussionist Steve Peregrin Took. The duo signs a recording deal with producer Tony Visconti, for release on EMI's Regal Zonophone label. Following a poorly received US tour, Steve Took leaves to work on his own music and is replaced by Mickey Finn (3).

After a while Tony Visconti shifts label outlet for his productions from Regal Zonophone to Fly Records (3) in UK. After much urging from his producer, Marc Bolan abbreviates his group name to T. Rex and expands to a quartet with the addition of Steve Currie on bass and Bill Legend on drums.