The Duke of Sussex
looked smart as he joined boxing duo Anthony Joshua
and Nicola Adams at the Black Prince's Trust in Lambeth, South London
Prince Harry, 34, opted for a grey blazer, crisp white shirt and black trousers as he arrived without his wife Meghan, 37, who still on maternity leave looking after baby Archie.
The Duke will launch a new campaign called Made by Sport, which will bring together a coalition of charities supporting disadvantaged young people through sport.
It aims to take advantage of the proven role sport can play in developing skills that make a difference at school, work and life.
The new campaign will also raise vital funds, £40 million, to support sports provision and grassroots clubs and organisations in disadvantaged communities across the UK.
On his arrival at the event, which is being staged at the Community Sports Hub, the Duke will meet young people taking part in boxing training sessions.
They will be led by Nicola Adams, a double Olympic gold medallist, and heavyweight fighter Joshua who had a shock defeat to Andy Ruiz Jr in New York earlier this month, losing his IBF, WBO and WBA world titles.
Anthony Joshua opted for a more casual look as he wore a grey t-shirt, black jeans and white trainers for the occasion.
With a smile from ear to ear, he could be seen giving a thumbs up to the photographers as he headed inside.
Prince Harry will also hear from grassroots coaches about how they think the campaign will make a difference to young people's lives and give a short speech before leaving.
It's been a busy few days for the proud new father, who arrived on his own for a concert hosted by his charity Sentebale in Hampton Court Palace.
There, he was by by celebrities including Katherine Jenkins, Gemma Arterton and Emilia Fox.
The Duke welcomed singer Rita Ora with a hug when they were introduced at King Henry VIII's famous home where entertainers from across the Commonwealth performed in the open-air.
Ora said after their meeting: 'I'm so excited, a little bit of rain never really hurts anybody, I'm just happy to be here and to be able to support and try and raise as much awareness and money for such a great cause.'