There is more than one artist with this name, including:
1) Steve Martin (born 14 August 1945) is a popular American comedian, screenwriter, actor and musician (the latter especially as a banjoist).
2) Steve Martin is a gospel guitar player.

1) Steve Martin (born Stephen Glenn Martin in Waco, TX on 14 August 1945) is a popular American comedian, screenwriter, actor and musician – the latter especially as a banjoist. He has recorded as Steve Martin and the Steep Canyon Rangers and as the duo Steve Martin & Edie Brickell.