Fitness icon Richard Simmons has tragically passed away, as confirmed by sources in law enforcement to NBC News.

Simmons was discovered unresponsive at his Hollywood Hills residence in Los Angeles on Saturday, the day following his 76th birthday. Law enforcement sources have indicated that the exact cause of his death is currently pending.

In a poignant statement, Simmons' brother, Lenny Simmons, urged people to celebrate Richard's life with joy rather than sorrow. "I don’t want people to be sad about my brother," Lenny Simmons said. "I want them to remember him for the genuine joy and love he brought to people’s lives."

Tom Estey, Simmons' longtime publicist, echoed these sentiments, describing Richard as "an Angel" whose passing has deeply affected those who knew and loved him.

Just a day prior to his passing, Simmons took to social media to express gratitude for the overwhelming birthday wishes from fans. "Thank you…I never received so many messages about my birthday in my life!" Simmons wrote. "I am sitting here writing emails. Have a most beautiful rest of your Friday."

Throughout his illustrious career, Simmons became renowned for his dynamic personality and groundbreaking fitness programs, particularly through his "Sweatin’ to the Oldies" workout videos. Rising to prominence in the 1970s and 1980s, he established fitness centers and released numerous workout videos that inspired millions globally.

Described on his website as "one of the world’s most revered and iconic fitness personalities," Simmons was celebrated for his ability to blend humor with practical health advice, assisting countless individuals in shedding excess weight through balanced eating and invigorating exercise routines.

Born and raised in New Orleans, Simmons confronted weight challenges from an early age, reaching nearly 200 pounds by age 15. Despite these difficulties, he persevered and pursued a modeling career after being discovered while studying art on scholarship in Florence, Italy.

Simmons' modeling career led him to appear in over 130 commercials, showcasing his versatility in roles ranging from a dancing meatball to endorsing brands like Fruit of the Loom and Dannon yogurt. His personal experiences, including a pivotal moment involving a note warning him about the risks of obesity-related health issues, motivated him to embark on a transformative journey toward health and fitness.

Upon relocating to Los Angeles in 1973, Simmons encountered a dearth of fitness facilities accessible to those seeking to improve their health without already being in peak physical condition. In response, he founded SLIMMONS in Beverly Hills in 1974, a gym designed to cater to individuals of all fitness levels. His dedication to promoting healthy lifestyles extended to launching Ruffage, a pioneering health food restaurant, and the Anatomy Asylum exercise studio.

Simmons' charisma and sincere concern for the well-being of others drew a diverse clientele, including celebrities such as Barbra Streisand, Diana Ross, and Dustin Hoffman. His growing influence in the health and fitness industry led to television appearances and the creation of his own nationally syndicated series, "The Richard Simmons Show," which earned multiple Emmy awards during its four-year run. Simmons also authored nine books and three cookbooks, reflecting his comprehensive approach to health and nutrition.

Despite his professional achievements, Simmons withdrew from public life around 2014, seeking a quieter existence away from the spotlight. His decision to step back was accompanied by sporadic updates on social media, where he continued to inspire followers with motivational messages and reflections on his life experiences.

In early 2022, Simmons addressed concerns regarding an unauthorized biopic depicting his life, emphasizing his desire for privacy and tranquility in his later years. His candid social media posts, ranging from personal anecdotes to advocacy for healthy living, resonated deeply with his devoted fan base.

Simmons' recent social media activity included a poignant message hinting at health issues, later clarifying his intent was to encourage others to embrace each day. Despite coping with a diagnosis of basal cell carcinoma, a form of skin cancer, Simmons remained resilient and optimistic, undergoing successful treatments to manage the condition.

As news of Richard Simmons' passing reverberates, tributes pour in from admirers worldwide, celebrating his enduring legacy as a pioneer in fitness and a source of positivity. His impact on millions through his infectious enthusiasm for health and well-being ensures his memory will continue to inspire future generations.

The circumstances surrounding Simmons' recent health challenges and their relation to his passing are currently under scrutiny, awaiting further details from official sources.

In conclusion, Richard Simmons leaves behind a legacy marked by compassion, resilience, and an unwavering commitment to empowering others to lead healthier lives. His contributions to the fitness industry and advocacy for positive change serve as enduring testaments to his remarkable life and legacy.