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David Cassidy, the teen idol who soared to fame as the embodiment of 1970s youth in his role on "The Partridge Family," has died. He was 67 years old.

“On behalf of the entire Cassidy family, it is with great sadness that we announce the passing of our father, our uncle, and our dear brother, David Cassidy,” Jo-Ann Geffen, president and CEO of JAG Entertainment said in a statement.

"David died surrounded by those he loved, with joy in his heart and free from the pain that had gripped him for so long."

The death came after a close family friend said on Nov. 18 that Cassidy had been hospitalized for organ failure and needed a liver transplant. "Thank you for the abundance and support you have shown him these many years," Geffen said in the statement on behalf of the family.

PHOTOS: David Cassidy's Life in Pictures

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Cassidy played the wholesome Keith Partridge on "The Partridge Family," a sitcom about a widowed mother and five children who formed a bubblegum pop band. The popular show catapulted Cassidy to heartthrob status, and he toured the world to sing hits from it such as "I Think I Love You" before throngs of teen girls.

David Cassidy in a 1972 publicity still for "The Partridge Family." ABC via Getty Images

After serving as lead vocalist for multiple albums for the show, which aired for four seasons, Cassidy had a wildly successful breakout singing career on his own. His appearances garnered so much hysteria, media at the time referred to it as "Cassidymania."

But it was lonely at the top: By the time the baby-faced Cassidy reached his mid-twenties, his stardom had faded, and he was unsure how to cope.

David Cassidy performs in Nashville in 2012. Rick Diamond / Getty Images for IEBA file

"There were some real dark years for me where I was personally lost," he told Access Hollywood in February 2017, after it was revealed he was suffering from dementia. "I didn't know what to do with myself. I didn't know what to do. I didn't feel I could have any chance in having a real career again."

Related: David Cassidy, ‘Partridge Family’ Star, Reveals He Has Dementia

In the past decade, Cassidy has spoken out about his struggles with alcohol and drunk driving arrests and other personal problems, including divorce and bankruptcy.

Earlier this year, after fans expressed concern following a concert in California during which he reportedly struggled to remember the lyrics of songs he had been performing for 50 years, Cassidy said he had dementia — an illness both his grandfather and mothered had battled.

"I was in denial, but a part of me always knew this was coming,” he told People magazine.

Tributes began pouring in from those mourning Cassidy’s death.

Brian Wilson, who co-founded the Beach Boys, recalled on Twitter: "There were times in the mid-1970s when he would come over to my house and we even started writing a song together. He was a very talented and nice person. Love & Mercy to David and his family."

The Cure founding member Lol Tolhurst said: "Farewell David Cassidy, For some of us that travel the broad highway it's just like that sometimes. May you rest In peace Brother."

Musician and actor Harry Connick Jr. also expressed his condolences, writing "R.I.P. friend."

so sad to hear of the passing of david cassidy... he was always so kind to me - such a pleasure to have had him on my show... sending love and prayers to his family... R.I.P. friend ❤️ pic.twitter.com/tsFkNiJzFc — Harry Connick Jr (@HarryConnickJR) November 22, 2017

So sorry to hear about David Cassidy's passing. Godspeed. pic.twitter.com/JpKs2VNvZw — Rick Springfield (@rickspringfield) November 22, 2017

My thoughts and prayers are with the family and loved ones of David Cassidy ... part of a musical legacy via his role as "Keith Partridge" that brought music and laughter into the homes of millions ... 🎼🙏🕊️ pic.twitter.com/tgj1IXkUBt — Gloria Gaynor (@gloriagaynor) November 22, 2017