But he's been given something a little sweeter than novelty socks and a slogan card. Toblerone has unveiled a giant edible portrait of William and George, based on a photo of the pair from their recent tour of Australia and New Zealand.
The portrait was created by food artist Michelle Wibowo from Michelle Sugar Art, and uses a whopping 16,074 individual chunks of Toblerone from over 1,500 bars.
The enormous chocolate treat, which measures 12 ft by 8 ft and weighs in at 154 kg, was the result of 100 hours of planning, preparation and construction.
Speaking about her masterpiece, Michelle said "When I was asked to create a portrait of Prince William and baby George, I was very excited.
"Everyone's first Father's Day is a memorable occasion, and what better way to mark the nation's favourite Royal father than by creating an edible portrait of him.
"It has taken me a long time to map out the exact location for each tiny piece of chocolate to create a recognizable image, but the hardest process was trying not to eat the Toblerone along the way!"
We hope it's being kept in the fridge with this weather, or Father's Day at Kensington Palace will be a very sad day indeed...