Betty Luster is an American television actress, singer and dancer, whose career was active in the 1940s and 1950s. The role for which she is best remembered today was at one time her most obscure: She portrayed Mr. B Natural in the short film of the same name, made famous after its inclusion in a 1991 episode of "Mystery Science Theater 3000". Wikipedia
The definitive Wikipedia entry for Betty Luster. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Betty_Luster