Paul McCartney and his girlfriend acted like “besotted teenagers” during a night out this week, reports.

The 66-year-old musician and his 48-year-old partner Nancy Shevell stunned fellow guests at the London after-party for The Boat That Rocked movie premiere this week with their public displays of affection and frequent outings to the dancefloor. At one point the couple gyrated to Rolling Stones classic Satisfaction.

“Paul was having a great time. He was on brilliant form, mingling with partygoers,” a source said. “Fans were asking for pictures and he was happily obliging and Nancy looked so loved-up and content.”

McCartney used the party to introduce Shevell — who he has reportedly been dating since November 2007 — to his friends and was delighted when they bonded quickly.

The source added to Britain’s Daily Mirror newspaper: “As well as speaking to the movie cast, including Rhys Ifans and Bill Nighy, Paul made a big deal of introducing Nancy to his friends Twiggy and Kenneth Branagh.

“He looked quite nervous but soon they were laughing like old friends and the idea of a dinner party was mooted.”

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