Amongst A-listers were Elton John, 75, and his husband David Furnish, 60, in addition to iconic model Twiggy, 73, (real name Lesley Lawson) and her actor husband Leigh, 77.
Paul and Ringo were supported by their wives Nancy Shevell, 63, and Bond girl Barbara Bach, 75.
Paul’s daughters, designer Stella McCartney, 51, and photographer Mary McCartney, 53, were also in attendance.
If These Partitions Could Sing is directed by Mary and can feature appearances from the likes of Paul McCartney, Elton John and Noel Gallagher.
The synopsis reads: “’On this personal film of memory and discovery, Mary McCartney guides us through nine a long time to see and experience the creative magic that makes it probably the most famous and longest-running studio on this planet.”
Elton John’s husband David Furnish and Twiggy also celebrated the Beatles documentary
Ringo Starr, 82, flashed a peace sign alongside his wife Barbara Bach, 75, Elton John, 75, and his husband David Furnish, 60, producer Giles Martin, 53, Twiggy, 73, and her husband Leigh Lawson, 77.