Cheeky Louis brushed some rain drops off Wills’ shoulder and pulled at his uniform.

The youngster was also seen showing of some dance moves in his seat.

Prince William turned towards his son and appeared to give him a tap on the leg.

As the parade continued, all three children looked towards their father and smiles as he spoke to them.

Meanwhile Kate, who sat next to Princess Charlotte was seen engrossed in conversation with veteran Bernard Morgan.

A lip reader also shared their expert comment on what the royals said to each other.

Youtube: Thesun