Britain's Prince William believes Prince George will be "bouncing around like a rabbit" on Christmas Day (25.12.15).
The 33-year-old royal is convinced he'll be up all night on Christmas Eve (24.12.15) because his two-year-old son now understands the festive period and will be so overcome with excitement about what's in store for the special day.
Speaking to Britain's The Big Issue magazine, he explained: "George will be bouncing around like a rabbit.
"I think George will be extremely bouncy this year because he's suddenly worked out what Christmas is all about ... If I get any sleep on Christmas Eve it'll be good."
And, although Prince William thinks this Christmas will be "challenging", the hunk and his wife Duchess Catherine, 33, can't wait to see how their seven-month-old daughter Princess Charlotte will react to the exciting festivities.
He added: "So that will be two children, one who suddenly appreciates Christmas, which could be quite challenging. But I'm looking forward to it."
The family are planning to spend this year at their country home, Anmer Hall, in Norfolk and will attend church in the morning before watching George open his gifts later on.
William explained: "We'll go to church as a family on Christmas Day, as we always do. Then we'll watch George try to tackle his presents as he tries to unwrap them.
"It's a very different experience at Christmas, having a family of your own."