The Sad Second Career of Saved by the Bell's Mr. Belding Brian Moylan · 10/20/11 01:56PM Dennis Haskins, the 60-year-old actor who played fun-busting principal Mr. Belding on the unkillable cockroach of a kid's show Saved by the Bell, now makes his living doing nostalgia-laden personal appearances at tacky bars. Times are tough indeed.