New Star Wars Movie Featuring Old Cast

So I just read that the new Star Wars movie being directed by J.J. Abrams will feature the original cast of Harrison Ford, Mark Hamill and Carrie Fisher. No offense, but these actors are old. How are you going to reach a new generation of movie-goers using those 3 in an action, sci-fi film? I’m hoping they play supporting roles and the leads are younger actors.