P.J. Proby (born James Marcus Smith, November 6, 1938) is an American singer, songwriter, and actor. In addition to his recording career, he has also portrayed Elvis Presley and Roy Orbison in musical theater productions. The stage name P.J. Proby was suggested to him by his friend Sharon Sheeley, who had had a boyfriend of the same name at high school.

Proby recorded the singles "Hold Me", "Somewhere" and "Maria". In 2008, Proby celebrated his 70th birthday and EMI released the Best of the EMI Years 1961–1972. Proby continues to write and record music on his own independent record label, Select Records, and performs across the UK on various Sixties themed concerts. Proby's latest music release is The Enigma in Gold – Volume 1.