The Duke of Cambridge, Prince William, played host to his parents-in-law while they celebrated their 34th wedding anniversary with the royal and their daughter Kate Middleton at the Queen's retreat in Norfolk.
And now it seems their bond is as strong as ever, as the prince laid on a special celebration for his in-laws at Sandrigham.
"They had a barbecue on Saturday afternoon," a royal source told the MailOnine. "Mike helped William, while the ladies entertained Prince George."
The monarch dropped a staggering £8 million on a helicopter for William and his young family to whiz them between royal engagements hassle free.
The luxury aircraft boasts room enough for seven passengers and comes complete with swanky leather seats.
The Queen is thought to have invested in the new chopper following an incident involving her son Charles and his wife Camilla the Duchess of Cornwall.
Charles and Camilla were subject to a safety scare last year when their chartered chopper was forced to make an emergency landing on its way to the Hay-on-Why Festival in Wales....