Prince Harry jokes he's 'not sure what country we're in' after whirlwind trip to see Meghan Markle

Beaming from ear-to-ear and waving to wellwishers, it was hard not to notice Prince Harry's demeanour was especially cheerful as he stepped out for a good cause, beaming from ear to ear and waving to fans. The Prince attended the ICAP charity day in London on Wednesday (Dec. 7) on behalf of his organization Sentebale.

He was faced with a sea of brokers dressed in fancy dress, which promoted him to quip: "I'm not entirely sure what country we're in."

Harry, 32, made no reference to his new transatlantic relationship but it was hard not to notice his cheerful demeanour. The royal made an upbeat appearance at the official engagement, beaming from ear-to-ear and waving to well-wishers as he arrived.

He joined City brokers on the trading floor for the fundraising event when, for one day only each year, ICAP donates all revenues and commissions to a select group of charities. This year's beneficiaries are Harry's charity Sentebale and mothers2mothers.

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The Prince did his best to channel a broker at the global firm, using his wit and humour to seal deals. "50 million, done," he was heard saying on the phone. Negotiating another deal he quipped, "We'd like a bit more than that," prompting laughter from the trading floor.

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He closed deals across eight floors and met staff who had donned fancy dress, wearing anything from the Spice Girls costumes to cowboys and pirates. Harry was subjected to some light teasing and asked why he wasn't in costume.

He met project manager on the Triage desk Parry Vaughan, 55, who has been with ICAP for 20 years and was dressed as a female pirate. "I'm a bit of a sexy pirate," Parry told him, to which Harry joked: "No need to show me leg" before grimacing.

Harry played broker for the day at the ICAP charity day

Joining Harry at the star-studded charity event was Prince Edward's wife, the Countess of Wessex. Sophie looked sensational in a cream dress and wasted no time in picking up the phones.

Other famous faces from the TV, music, fashion and sports worlds included Twiggy, Mollie King, Tulisa, Jodie Kidd, Jon Snow, Samantha Bond, Dr Christian Jessen and Jeremy Vine.

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Since 1993 ICAP's charity day has raised almost £127 million for charities around the world, with more than 60 ICAP offices worldwide taking part annually. The firm has shown its support for Harry's charity before, and helped fund its new centre, the Mamohato Children's Centre, in Lesotho.

The Prince helped seal deals over the phone

Sentebale supports orphans and vulnerable children in Lesotho, many of who are affected by HIV/AIDS.

Cathy Ferrier, CEO of Sentebale, said afterwards of the Prince: "He was great. We did a number of trades on a number of floors. I have no idea what we actually bought but apparently we made a profit so we're good."

She added: "When we ask him to do things like this we're very fortunate that he's prepared to get it into his schedule even though his schedule is fairly crazy at the moment."