Richard Simmons, a fitness icon, has died, according to reports. He was 76.

Simmons, who was known for his "Sweatin' to the Oldies" workout videos, just celebrated his 76th birthday on Friday. 

An LAFD spokesperson told Fox News Digital that first responders were dispatched for a cardiac arrest of a 76-year-old man at Simmons' Los Angeles home, without identifying Simmons as the patient. The patient was pronounced dead at the scene of natural causes, LAFD said. 

An LAPD spokesperson told Fox News Digital officers had responded to Simmons' home for a death investigation that was completed at 10 a.m. this morning.

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His death was confirmed by his rep, ABC News reported

"I never got so many messages about my birthday in my life!" Simmons wrote on his Facebook page on Friday. 

The former fitness coach, who stepped away from the spotlight 10 years ago, told People magazine in an interview this week that he was "grateful" to be "alive for another day" following his skin cancer diagnosis. 

He said he planned to blow out a candle to mark the occasion, but "But the candle will probably be on a zucchini. You know, I'm a vegetarian." 

"I am grateful that I'm here, that I am alive for another day," he continued. "I'll spend my birthday doing what I do every day, which is to help people."  

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In March, Simmons revealed to his followers he had been diagnosed with skin cancer. He took to Facebook to detail the moment he found out about the diagnosis and the procedure he underwent in an attempt to remove the cancer cells.