The Duchess of Cambridge made a surprise public appearance Friday morning – her first since the birth of her son.

The Duchess and Prince William attended a marathon on the island of Anglesey, where the couple currently lives.

Their five-week old son, Prince George, was not with them as they met and spoke with competitors, volunteers and relatives.

Friday's event was the prince's last official engagement before he takes on a new position with the military in September.

The couple is scheduled to appear in public again on Sept. 12, at a conservation event in London.