Son of John Jeremy ("Jinx") Grafftey-Smith, a merchant banker, and his wife Lucy, Smith was educated at Marlborough College, where he developed his musical skills.

[2][3] His grandfather, Sir Laurence Grafftey-Smith, was a diplomat who served as High Commissioner for the U.K. in Pakistan from 1947 to 1951 and Ambassador to Saudi Arabia from 1945 to 1947.

[7] Having been with the band since 1992, Smith left Jamiroquai on 29 April 2002 during the Funk Odyssey tour due to family commitments.

[9] Smith produced the 2009 album Caught In The Headlights for the British band Absent Elk.

[10] In 2013, he co-produced Matt Cardle's third album, Porcelain, as well as providing writing contributions to several songs.