Finn was born in Thornton Heath, Surrey. After he joined Tyrannosaurus Rex in late 1969, it was rumoured that Bolan had hired Finn for his good looks, and because he admired his motorcycle, rather than for his musical ability. Finn was unable to recreate the complex rhythmical patterns of his predecessor, Steve Peregrin Took, and was effectively hired as much for a visual foil for Bolan as for his drumming. The BBC news commented on this, saying "Marc Bolan was supposed to have said of Finn: 'He can't sing... but he looks superb.
