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The Beatles were advised by Epstein to make no comments about the football clubs they supported because it could alienate some fans, though it was well known that McCartney was a supporter of Everton Football Club, and that his father and relatives used to take him to matches. His allegiance later shifted to Liverpool F.C., as on 28 July 1968, The Beatles were photographed in a photographer's studio at 192–212 Gray's Inn Road, with McCartney wearing a Liverpool F.C. rosette. Linda McCartney later said: "We spent last night listening to Liverpool football team on the radio, wanting them to win so badly. Paul supports Liverpool. He was for Everton for a while because of his family — but it's all Liverpool now."
Lennon and McCartney were present to watch the 1966 FA Cup Final at Wembley, between Everton and Sheffield Wednesday, and McCartney attended the 1968 FA Cup Final (18 May 1968) which was played by West Bromwich Albion against Everton. After the end of the match, McCartney shared cigarettes and whisky with other football fans. The ex-Liverpool player, Albert Stubbins, was the only footballer shown on the Sgt. Pepper's Lonely Hearts Club Band cover. McCartney tried to listen (on a radio) to the Liverpool v Manchester United 1977 FA Cup Final, while sailing in the Caribbean, and the video for McCartney's "Pipes of Peace" (in 1983) recreated the 1915 football game played between German and British troops during World War I, at Christmas.
At the end of the live version of "Coming Up" recorded in Glasgow in 1979 (later to become a US number one single) the crowd begins to sing "Paul McCartney!" until McCartney takes over and changes the chant to "Kenny Dalglish!", referring to the current Liverpool and Scotland striker. At the same concert, Gordon Smith, former football player who played for Rangers and Brighton & Hove Albion, met the McCartneys, and later accepted an invitation to visit their home in East Sussex in 1980. Smith later said that McCartney was "thrilled I knew Kenny Dalglish", to which Linda added: "I like Gordon McQueen of Man United", and Smith replied, "I know him too."
McCartney attended the 1986 FA Cup Final between Liverpool and Everton, and in 1989, he contributed to the Ferry Cross the Mersey charity single that was recorded to aid victims of the Hillsborough Disaster, which happened during a match between Liverpool and Nottingham Forest. McCartney performed at the Liverpool F.C. Anfield stadium on 1 June 2008, as a part of Liverpool's European Capital of Culture year. Dave Grohl from the Foo Fighters sang with McCartney on "Band on the Run", and played drums on "Back in the U.S.S.R.". Ono and Olivia Harrison attended the concert, along with Ken Dodd, and the former Liverpool F.C. football manager Rafael Benítez.
In an interview in 2008, McCartney ended speculation about his allegiance when he said:
"Here's the deal: my father was born in Everton, my family are officially Evertonians, so if it comes down to a derby match or an FA Cup final between the two, I would have to support Everton. But after a concert at Wembley Arena I got a bit of a friendship with Kenny Dalglish, who had been to the gig and I thought 'You know what? I am just going to support them both because it's all Liverpool and I don't have that Catholic-Protestant thing.' So I did have to get special dispensation from the Pope to do this but that's it, too bad. I support them both. They are both great teams, but if it comes to the crunch, I'm Evertonian."
In 2010, there was heavy speculation surrounding McCartney that he was to head up a consortium launching a take-over bid for struggling Charlton Athletic. Links between the club and the famous musician go a long way back with Charlton's famous supporters anthem – Valley, Floyd Road – using the tune and a number of lyrics from the Wings song "Mull of Kintyre".