Yavor Kostov appeared on the Bulgarian version of the show, called Koi iska da stane bogat, in June 28, 2005, and made it to the final question, being the youngest to do so aged only 18. However, he got it wrong, resulting in a huge loss and losing the opportunity to become Bulgaria's first top prize winner (Asen Angelov done this in June 13, 2002 but he broke the show's rules and was therefore forced to return his prize). However, his appearance on the show has made him well-known in Bulgaria.