The Deep Purple co-founder lost his battle to pancreatic cancer today (July 16) after suffering a pulmonary embolism.
He was surrounded by his family at the London Clinic. A statement added: "Jon passes from Darkness to Light."
Lord co-founded the iconic rock band in 1968 and served as their keyboard player and writer.
Deep Purple split in 1976 but reformed in 1984, releasing Perfect Strangers, their first album since 1975's Come Taste the Band.
Lord retired from Deep Purple in 2002.
Ha has also worked with other bands including Whitesnake, Paice, Ashton & Lord and The Artwoods.
Watch a music video for Deep Purple's 'Perfect Stangers' below: