Harry spoke about his upcoming birthday as he attended a 'curtain raiser' event for the Invictus Games, which will officially begin on Wednesday evening.
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Prince Harry has said he is 'starting to feel old' ahead of his 30th
Handing out medals after a driving challenge in Warwickshire, the prince revealed he would probably celebrate his big day by getting involved in the Invictus Games in some way.
According to the BBC, he then likened the feeling of anticipating his 30th to seeing a 30mph road sign as you enter a village.
"I'm slowly starting to feel old… I am actually quite old," Harry said. "I think I'm always young at heart. Surrounding myself with these guys and girls does keep me young. They're sharp-witted and their sense of humour is on it."
Prince Harry hands out medals at the Jaguar Land Rover Driving Challenge
Action man Harry got behind the wheel of a 4x4 and tackled a difficult assault course during his visit. He then watched the teams take part in the Jaguar Land Rover Driving Challenge – and was all smiles as Australia took home the gold.
Harry has admitted he's had some "sleepless nights" in the run-up to the games, which are his brainchild and based on a similar event, The Warrior Games, in America. "The Americans made it, I stole it, and we made it bigger," he previously said.
Action man Harry gets behind the wheel
The prince has also spoken about using his position to make the inaugural event a popular one.
"I'm at the stage of my life now where over the last couple of years I have realised what a difference it can make," he said. "Using the position to do good is something I have tried to do for many years of my life, but this is a classic example."
Proud Prince Harry will see the Invictus Games officially launch on Wednesday evening
An opening ceremony for the Invictus Games will take place at Queen Elizabeth Olympic Park on Wednesday evening.
Over 400 competitors from 13 nations will take part in the games, a sporting event for wounded, injured and sick servicemen and women, which will run until Sunday.