Prince William and Kate Middleton don't want to "weigh Prince George down" with the "burden" of becoming the future king, an expert has claimed. Royal biographer Katie Nicholl says that while George, who celebrated his ninth birthday last week, "understands" he will be King one day, it is "not made into a big deal." Speaking exclusively to OK!, Katie said: "William struggled with [knowing his destiny] when he was a young man and he’s very keen George doesn’t experience that same sense of burden from an early age.