It was the day Ringo Starr got by with help from a little friend – Paul McCartney’s stepdaughter Heather.
The six-year-old gleefully picked up the drumsticks as The Beatles practised in the studio in January 1969.
Footage of the moment appears in a four-minute trailer for the six-hour documentary Get Back, compiled from footage locked away in a vault for more than half a century.
Little drummer girl: Ringo Starr pretends to be upset as six-year-old Heather gets in the swing
The six-hour documentary Get Back is compiled from footage locked away in a vault for more than half a century
Heather, daughter of McCartney’s bride-to-be Linda, is also seen singing with John Lennon.
The three-part documentary uses material shot for the 1970 film Let It Be and includes The Beatles’ final live performance together – the rooftop concert at their Apple HQ in Savile Row, London.
It will be shown on Disney+ across three days next month.
The latest trailer also offers up a rare image of the band’s first manager Allan Williams in a recording studio with Sir Paul and Lennon.
Mr Williams – who affectionately became known as ‘the man who gave The Beatles away’ – stopped working with the band in 1961 as they were on the cusp of stardom.
He is widely credited as the man who gave the Liverpool band their big break as he drove them to Hamburg in 1960 – their first foray on to the world stage.
But they fell out in an argument over commission and he stopped working with them before warning eventual Beatles manager Brian Epstein not to touch them ‘with a bargepole’.
Two of us: Paul McCartney’s stepdaughter Heather singing with John Lennon
Don’t let me down: Paul McCartney keeps the group’s spirits up as the Fab Four practise in the studio
Mr Williams died in 2016 at the age of 86.
The new documentary follows Lennon, Sir Paul, George Harrison and Sir Ringo Starr and their creative process as they write and rehearse 14 new songs in preparation for their first live show in more than two years.
The tracks were originally intended for release on an accompanying live album.
The producers on the documentary include Sir Paul, Sir Ringo, Lennon’s former wife Yoko Ono and Harrison’s former wife Olivia.