Sir George Martin, the record producer known as the "Fifth Beatle", has died aged 90, Ringo Starr has said on Twitter.
Sir George helped the Beatles achieve global success as the head of the Parlophone record label after hearing their demo tape in 1962.
ITV News Correspondent Nina Nannar reports
George Martin "saw the real talent in John Lennon and Paul McCartney", Beatles biographer Philip Norman said as he paid tribute to the star.
Martin, who signed the Beatles, died yesterday aged 90. He is survived by his wife Judy and four children.
Mr Norman told ITV News: "He devoted himself to making it sound as good as it could. He became a celebrity producer although he didn't want to be a celebrity."
Paul McCartney's lengthy tribute to "fifth Beatle" George Martin credits the pop impresario with guiding the Fab Four's musical direction.
The man who made the Fab Four has died aged 90.
The Beatles' record producer, Sir George Martin has died at the age of 90, according to Ringo Starr.