Country music star Glen Campbell dies at age 81

Glen Campbell, the country music star who produced 75 chart hits including "Rhinestone Cowboy" and "By the Time I Get to Phoenix" has died at age 81, his family have announced.

Campbell was one of the best known voices in country music, who became one of the biggest stars of the 1960s and 70s and also branched out into TV and film roles.

He had died in Nashville on Tuesday after a "long and courageous battle with Alzheimer's disease", his family said in a statement posted on his website.

Glen Campbell performing in 1987. Credit: AP

Fellow country singer Dolly Parton has paid an emotional tribute on Twitter: "Glen Campbell was one of the greatest voices of all time. I will always love you, Glen!"

She said: "Glen Campbell was special because he was so gifted. Glen is one of the greatest voices that ever was in the business and he was one of the greatest musicians."

The Beach Boys' Brian Wilson said: "I'm very broken up to hear about my friend Glen Campbell. An incredible musician and an even better person. I'm at a loss. Love & Mercy."

Carole King also paid tribute saying: "RIP Glen Campbell - a great singer and musician who wrote and chose to cover great songs."

US senator John McCain paid tribute to "a great Arizonan", he tweeted: "Saddened by the passing of Glen Campbell, a great entertainer, a great man & a great Arizonan - thanks for the memories!"

Campbell was the youngest of 12 children in a desperately poor sharecropping family in Arkansas, whose birth in 1936 came as the US was gripped by a deep economic depression.

He got his first guitar at age four and quickly showed a talent for music that would define his life.

Campbell first made his name working in The Wrecking Crew group of studio musicians who worked under legendary producer Phil Spector.

He contributed to a host of famed records including the Beach Boys album Pet Sounds.

That contact led to an invite to join the Beach Boys on tour in 1964 to replace Brian Wilson after his nervous breakdown.

Glen Campbell was famous across music, television and film. Credit: AP

Meanwhile Campbell was also developing his career as a solo artist, winning his first record deal in 1962 and scoring his first major hit five years later with "By the Time I Get to Phoenix".

It was just the start of a career that saw him rise to become one of the biggest musical stars of the late 1960s and 1970s. He sold more than 45 million records, had 12 gold albums and 75 chart hits.

Campbell also branched out in TV and film, presenting the television show "The Glen Campbell Good Time Hour” between 1969 and 1972, which was screened in the UK, Australia and Singapore and featured some of the biggest music stars of the day.

He also co-starred with John Wayne in the 1969 movie "True Grit" - one of more than ten feature film roles he took on.

Glen Campbell announced in 2011 that he had been diagnosed with Alzheimer's. Credit: AP

In 2011, Campbell, announced that he had been diagnosed with Alzheimer's disease and would be retiring from his music career.

He launched a final tour and starred in the 2014 documentary "I'll Be Me" chronicling his last performances and his battle with Alzheimer's, before spending his final years in a care home.

Campbell is survived by his wife, Kim Campbell of Nashville, TN; their three children, Cal, Shannon and Ashley.

He also leaves five children from previous marriages, Debby, Kelli, Travis, Kane, and Dillon; ten grandchildren, with a line stretching into great-great-grandchildren.

Fans have been paying tribute on social media.