The former teen star David Cassidy has died at the age of 67 from organ failure, only seven months after it was announced that he was battling dementia.

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

"Thank you for the abundance and support you have shown him these many years."

David first came to the world's attention as the star of the smash hit TV show The Partridge Family, which aired from 1970-74.

The show gave him an audience for his music and his first major single 'I think I Love You' hit number one, selling five million copies.

At one point, his fan club had more members than Elvis or The Beatles.

Writing on Twitter, Brian Wilson stated: "I’m very sad to hear about David Cassidy. 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."

While Diane Warren stated: "Bye bye childhood RIP David Cassidy."

And Kevin Smith wrote: "I grew up in an era before even cable TV, when The Partridge Family was already in reruns. David Cassidy's Keith was one of my favorite TV characters. He was legit funny AND he could sing. The man entertained me during my childhood and even years later."

While Harry Connick Jr shared this lovely photo:

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

Here are some of the other heartfelt tributes:

#DavidCassidy. You were so sweet to me and you left us too soon. To me and millions of us you were forever young. RIP. pic.twitter.com/3JcjvKiUIA

— Marlee Matlin (@MarleeMatlin) November 22, 2017

"RIP David Cassidy" Who my age did not want to look like, sound like, just be him when they were young? I was lucky to get to know the sweet & very funny real David as an adult & I still wanted to be him.

— Tom Arnold (@TomArnold) November 22, 2017

Heartbroken over the passing of #DavidCassidy. He graced the covers of teen magazines w/ my Brothers in the ‘70s. My condolences to his Family. ??‘? #RIP #PartridgeFamily #DavidsHitSong #70sIcon #IWokeUpInLoveThisMorning pic.twitter.com/EUJXr8YBwb

— Marie Osmond (@marieosmond) November 22, 2017

So sad to hear about #DavidCassidy Met him at a gig about 10 years ago and he was incredibly warm and gracious. RIP

— Richard Marx (@richardmarx) November 22, 2017

RIP #DavidCassidy my preteen heart is ?‘? https://t.co/kQyE8jaP1L via @youtube

— Lori Loughlin (@LoriLoughlin) November 22, 2017

Sad to learn David Cassidy has died. Like his father Jack he had great talent, and a complicated life. Condolences to his wonderful family.

— Larry King (@kingsthings) 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

So sorry to hear about David Cassidy's passing. Godspeed. pic.twitter.com/JpKs2VNvZw

— Rick Springfield (@rickspringfield) November 22, 2017

I grew up in an era before even cable TV, when The Partridge Family was already in reruns. David Cassidy's Keith was one of my favorite TV characters. He was legit funny AND he could sing. The man entertained me during my childhood and even years later: https://t.co/678DU7qTxh

— KevinSmith (@ThatKevinSmith) November 22, 2017

I’m very sad to hear about David Cassidy. 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.

— Brian Wilson (@BrianWilsonLive) November 22, 2017

Bye bye childhood RIP David Cassidy

— Diane Warren (@Diane_Warren) November 22, 2017