Rest in peace, Maurice White.

According to TMZ, the Earth, Wind & Fire co-founder and singer died in his sleep on Thursday, Feb. 4. He was 74-years-old.

maurice white

Maurice in 1975.

The music icon — who is known for many hit songs including "Boogie Wonderland," "September" and "Let's Groove" — sadly passed away after a long battle with Parkinson's disease. He was diagnosed in 1992 and stopped touring with the band two years later due to his illness.

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Maurice is survived by his two brothers and fellow band members, Verdine, 64, and Fred, 61.

Our thoughts are with Maurice's family during this difficult time.