<P> Elizabeth Ann Theresa `` Betty '' Lynn ( born August 29 , 1926 ) is a former American actress . She is best known for her role as Thelma Lou , Deputy Barney Fife 's girlfriend , on The Andy Griffith Show . She is the last surviving multi-season regular adult cast member from that series . </P>
who played thelma lou in andy griffith show
Elizabeth Ann Theresa `` Betty '' Lynn