How old is Richie Rich?

US fashion designer Richard Eichhorn, aka Richie Rich, is 47 years old (born November 11, 1970).

Rap singer Richard Serrell, aka Richie Rich, is 49 years old (born June 25, 1968).
*another source gives a birthday of March 1

Comics character
Richard "Richie" Rich, Jr. is a fictional character that debuted in Harvey Comics' Little Dot #1, cover-dated September 1953. The first Richie Rich comic appeared in November 1960.