The current King of Jordan, the picture of whom you may have seen recently posted on Facebook in full battle gear in the aftermath of the Jordanian pilot being burned alive by ISIS. King Abdullah was studying in Georgetown University and really became enamored with the show, Star Trek;The Next Generation and through his connections got to make an appearance on the show. There is a clip of his appearance on YouTube, where he appears for a few seconds in a Star Trek uniform entering the scene coming off an elevator and greeting the crew.
His love of Star Trek has compelled him to build a Star Trek Amusement Park across the border from Eilat, Israel. I read about it about 2 years ago but have no updated information about the project since then.