With Mythbusters running 14 seasons, it's understandable that most fans primarily associate the cast with the show that made them famous. Interestingly, though, several of them have interesting histories in Hollywood.
For instance, Jamie Hyneman helped work the special FX of the Tom Cruise hit Top Gun, and helped work on some of the animatronics in the Matrix sequels. He also owns a special FX company called M5 Industries. Adam Savage has been a model maker for the Matrix movies and Galaxy Quest, as well as Bicentennial Man (hey, work is work). Fittingly, Tory Belleci started out working for Hyneman at M5, and later worked on the Matrix movies, Galaxy Quest, and cult classic Starship Troopers. Engineering guru Grant Imahara has also worked on the Matrix movies and Galaxy Quest, as well as movies like Terminator 3 (again, work is work).
However, the main point of connection for many of the cast is Star Wars. For instance, Belleci worked at Industrial Light and Magic for years, serving as a model maker for the first two Prequels. Imahara was an engineer for ILM as well, and worked on all three prequels. Savage also worked at ILM and, like Belleci, served making models for the prequels. And, of course, Hyneman also worked on the prequels, working on the special FX team. His own FX company would later be how he got to know Belleci, eventually inviting him to join the show and get away from prequels forever.