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.
Fans have written tributes to George Martin on walls on Abbey Road today, following news of the Beatles producer's death at the age of 90.
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.