"It was probably a classic example of me probably being too much army, and not enough prince," he said of the incident in Las Vegas.
Saturday, Harry could be every bit army and prince – and give Buckingham Palace no reason to flinch.
The event plays right to the prince's strengths. He's charming, and as a member of the British armed forces who has deployed to Afghanistan three times, he has a deep affection for the military and those who serve.
"I don't think yet we've seen the full potential of Harry. I think that's still to come but my goodness, he's doing a pretty good job at the moment," former press secretary to the queen, Dickie Arbiter, told the BBC.