With only a few exceptions (those being Palpatine and Wedge), the old trilogy gave us the same actors in all the parts in all three films. The only Luke was Mark Hamill, the only Leia was Carrie Fisher, the only Han was Harrison Ford, the only Anakin was Sebastian Shaw. With the prequels, however, many of the returning character are played by new actors. It is because of the prequels that we must accept Ewan McGregor alongside Alec Guinness, Jake Lloyd and Hayden Christensen as well as Sebastian Shaw, Bonnie Piesse as well as Shelag Fraser, Joel Edgerton as well as Phil Brown, and Geneveive O'Reillu as well as Caroline Blakiston. Isn't it strange, then, that the trilogy that introduced so many casting changes, is the same trilogy that has many clamoring for Lucas to take the unprecedented step of digitally replacing the original actors with the new ones, in the name of a "continuity" that numerous other characters don't have?