Hollywood actors Clive Owen, Samuel L. Jackson, Damian Lewis and Sean Bean were among the famous faces who became stockbrokers for the day on Thursday (11Sep14) for a Transatlantic 9/11 charity event.

A whole host of actors, musicians, royals, sports stars, and celebrities joined in Cantor Fitzgerald's and BGC Partners' annual Charity Day, which commemorates the victims of America's 2001 terrorist attacks by raising money for good causes.

The event takes place in London and New York City, and actors including Owen, Bean and Lewis were among those who manned the phones on the U.K. leg along with Downton Abbey star Jim Carter and funnyman Stephen Fry.

Others taking part included British royal Princess Beatrice, tennis legend Boris Becker, girl group All Saints, and model David Gandy, while actor Steve Buscemi and Pamela Anderson turned out for the Big Apple event.

Jackson tweeted about the event, which took place 13 years after the devastating U.S. terrorist attacks, writing, "Up early headed to @BGCCharityDay reppin' @One4theBoys (charity) Don't forget to take a min to remember those who died on Nine Eleven!! (sic)."