Gary Coleman, who became a star as the tiny hero of NBC's "Diff'rent Strokes," says he blames his parents for his lack of maturity and a resulting reputation as a difficult, spoiled child star.

"I have a lot of trouble with industry people that respect my work, respect my craft but don't respect me because I have that shadowy reputation," Coleman told Bob Costas on the forthcoming NBC talk show "Later with Bob Costas."The 20-year-old actor is only 4-foot-8 because of drugs he takes to keep his body from rejecting two kidney transplants.

In the three years since "Diff'rent Strokes" went off the air, Coleman has had just two acting jobs.

He said he has little contact with his parents, calling them on the phone "once in a blue moon."