Fitness guru, TV personality and author Richard Simmons has died a day after his 76th birthday.

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ABC News reported Saturday that the Los Angeles Police Department responded to a 911 call at Simmons' home after his housekeeper discovered Simmons unresponsive.

TMZ said a fall Friday is believed to have contributed to his death and foul play is not suspected at this time.

Simmons was active on the social media platform X Friday, posting: "Thank you...I never got so many messages about my birthday in my life! I am sitting here writing emails. Have a most beautiful rest of your Friday. Love, Richard."