The two were seen laughing, smiling and shaking hands

By Adam Carlson
May 31, 2015 12:25 PM
David M. Benett/Getty

Polo just got seriously cool.

Prince Harry, 30, and Samuel L. Jackson, 66, were seen shaking hands, smiling and laughing at their meeting at the Audi Polo Challenge, in Ascot, England.

The royal and the Avengers star weren’t the only big names on the guest list. The event, which annually draws many stars, was also attended by Tom Hardy, Gemma Arterton and others.

It’s the second time in the space of a week that Harry has been back in the saddle for a polo match: He competed (and lost) in the The Jerudong Trophy at the Cirencester Park Polo Club in Gloucester, England, on May 24.

Last week, Harry finally met niece Princess Charlotte when he went to Prince William and Princess Kate‘s country home Anmer Hall, a royal source confirmed to PEOPLE.

Harry competed this weekend on behalf of Sentebale, the charity he co-founded more than 10 years ago to provide aid for the children of Lesotho.

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