Kenny G Files For Divorce

In the court docs -- filed Thursday in L.A. by Kenny's disso-queen attorney Laura Wasser -- the musician cites "irreconcilable differences" as the reason for the split from his wife Lyndie Benson-Gorelick. They've been married for 20 years.

In the docs, Kenny indicates there IS a prenup -- which is significant because Kenny's worth a reported $50 million.

Kenny also asks the court for joint legal and physical custody of the couple's minor son.