The Duke of Cambridge looked a little lost as he tried out his skills in a volleyball skills training session.
William laughed and joked with youngsters as he tried to work out where he was meant to be and to whom he should throw the ball during the session in west London today.
His foray into the sport comes just months after his wife, the Duchess of Cambridge, hit the headlines when she revealed her post-baby figure in a midriff top and skinny jeans while playing volleyball at a similar event for Sports Aid.
William, as patron of The Royal Foundation of The Duke and Duchess of Cambridge and Prince Harry, visited a Coach Core apprentice training session at Westway Sports Centre in west London today.
The royal trio launched the programme in July last year - a day before the London Olympics. It provides an intense training programme for 16 to 24-year-olds, many from disadvantaged social backgrounds, to become qualified sports coaches and inspire their peers.
William met Coach Core's advisory board and young apprentices from pilot programmes in London and Glasgow, run through organisations Greenhouse and Glasgow Life.
He also met apprentices from partner project RBI Harlem, which is supported by The American Friends of The Royal Foundation.
William then watched the apprentices running basketball and volleyball coaching sessions before having a go at being coached in the volleyball session himself.
Apprentice volleyball coach Rakeem Caesar, 18, said he was excited to have met the Duke.
He said his life was taking a turn for the worse before he became involved in sports.
"When I was younger I was defensive, I used to get angry and would get into arguments with other pupils," he said.
"If a teacher got involved I wouldn't care, I would feel really mad."
Mr Caesar said that after meeting an inspiring coach who encouraged him to play volleyball, he was able to challenge his anger and let off steam.
He now hopes to be a similar role model for other young people.
"I've become more confident and I'm able to use my dedication to the sport to help younger pupils at my school."
Tracy Simpson, also 18, said the Coach Core programme has helped her control her rage as well.
As a table tennis coach, she said she now had respect and a focus for her life.
"I know a few other children who have issues similar to mine when I was younger so I have tried to find ways to help them through their issues," she said.
"I want to help someone to improve their developmental skills and their personal life as well to help them be the best person they can be."
Coach Core Advisory Board member Owen Slot said Ms Simpson's attitude typified the aim of the programme.
"Tracey Simpson is one of the most inspirational young people I have ever met," he said.
"She has overcome anger issues that were once so bad that, in a fit of rage, she damaged her playing hand."
Glasgow Life project director David Bickley said the programme was about helping the apprentices with employment and social issues.
"We often provide support that they wouldn't get in their home lives," he said.
The current crop of London-based apprentice coaches are expected to graduate after Christmas.