Friends is one of the most popular sitcoms of all time and its amazing characters were the heart of the show—and we’re not just talking about the main cast. We were introduced to more amazing supporting characters than we can count and some of them were played by superstars who made a big splash on set.From household names to rising stars, Friends gave us some pretty epic cameos over the course of its ten seasons, and here are forty stars that you may have forgotten appeared on the show.