Princes William and Harry cracked jokes with each other as they made multi-billion pound deals for charity on a City trading floor.
As the brothers brokered big-figure trades they shouted remarks at one another, and Harry ribbed William for being preoccupied with "baby chat".
The princes were at brokerage firm BCG Partners in London's Docklands to raise money in memory of people who died in the attacks on New York's twin towers on September 11, 2001.
The American global financial services company lost 658 employees on 9/11 and has hosted an annual fundraising event in their memory since 2005.
Harry remarked to traders about his brother: "He's on the phone and it's all baby chat."He then turned to William and said: "Stop flirting, get on with it!"
One broker, Neil Fordham, called William a "natural" on the telephone."He even made a bit of a joke," the 45-year-old from Abridge in Essex said."He said, 'It's all a wind-up, I'm Gary'."
The pair continued to joke with each other as they sealed their deals, with William putting business on hold to "get to know" the person on the other end of the phone and assuring callers he was who he said he was: