Prince Harry joined hundreds of people who commemorated the 9/11 tragedy in their own way. The British royal showed his humanitarian side and joined celebrities who raised money for the benefit of those affected.

The Duke of Sussex was on hand at the 15th annual BCG Charity Day at Canary Wharf to help raise funds for victims and survivors of the tragic 9/11 terrorist attack . The first-time dad, who turns 35 on the weekend, had an early birthday celebration filled with a sense of camaraderie when he helped answer calls.

Trader Prince Harry @BGCCharityDay #PrinceHarry

— Sarah Hajibagheri (@SaraHajibagheri) September 11, 2019

According to reports, Prince Harry even showed his multitasking skills when he answered three calls at a time just to help close a trade deal. He successfully helped close a UK Sterling government bond worth £1 billion, otherwise called as Gilts.

#PrinceHarry #DukeofSussex closed a £1 BILLION UK Sterling government bond trade - known as Gilts. One of the largest trades in the market in the past 5 years raising funds for charity. The other brother is colluding with tabloids & cutting ribbons. The difference is leadership

— Meghanpedia (@meghanpedia) September 12, 2019

Shaun D. Lynn, president of BGC Partners, called Sept. 11's charity event the "best yet" given Prince Harry's involvement. During his opening speech, he especially mentioned that the royal's "closing skills" will definitely help raise funds.

"September 11 remains a day very close to our hearts and I am incredibly proud to be hosting our 15th Charity Day. It turns such a historic anniversary into an uplifting day for all involved," Lynn said.

"We have now raised around $159 million globally, an outstanding achievement, which would not be possible without the incredible support of our clients, staff and the charities involved each year," he added.

Some of the proceeds from the charity event also went to the Invictus Games Foundation, an organization that is close to Prince Harry's heart and which he founded to help wounded soldiers or veterans of war. The foundation also recently celebrated its fifth anniversary.

The BCG Charity Day is an annual event that honors the 61 EuroBrokers employees and 658 Cantor Fitzgerald staff who perished in the 9/11 attack on New York's World Trade Center in 2001. Other celebrities who joined Prince Harry at the charity event included actor Damian Lewis ("Billions"), comedian Alan Carr, and former professional boxers David Haye and Frank Bruno.

Prince Harry's wife, the Duchess of Sussex Meghan Markle, was not at the BCG Charity Day. She was last seen with the Duke at the Invictus Games anniversary in London on Tuesday.

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Former U.S. President Barack Obama and Prince Harry share a joke as they watch wheelchair baskeball on day 7 of the Invictus Games 2017 on September 29, 2017 in Toronto, Canada Getty