It might be piano banging rather than piano playing, but this video shows the young princes William and Harry in perfect harmony.
In the video clip from 1985 the brothers are taking part in an official photo shoot at Kensington Palace.
The scenes are all the more poignant because they show their adoring and radiant mother, Princess Diana, and their close and loving family life at that time. Prince Charles tries to get their attention by hiding under a handkerchief; Prince William helpfully dabs powder on Princess Diana's cheeks.
See the video below.