<P> Tina Cole ( born August 4 , 1943 ) is an American actress and singer . She is best known for her role as Katie Miller Douglas on the 1960s sitcom My Three Sons ( 1967 -- 72 ) , but she previously had a recurring role as Sunny Day in the detective series Hawaiian Eye ( 1963 ) . She was also a member of the Four King Cousins , a subgroup of the King Family Singers . In 1963 she played the minor ( uncredited ) role of Ruth Stewart in Palm Springs Weekend , a spring break party film set in Palm Springs , California . She also appeared previously in My Three Sons as a friend of Robby cast in the role of Joanne , before the Katie role was created circa 1966 . </P>
<P> Tina Cole ( born August 4 , 1943 ) is an American actress and singer . She is best known for her role as Katie Miller Douglas on the 1960s sitcom My Three Sons ( 1967 -- 72 ) , but she previously had a recurring role as Sunny Day in the detective series Hawaiian Eye ( 1963 ) . She was also a member of the Four King Cousins , a subgroup of the King Family Singers . In 1963 she played the minor ( uncredited ) role of Ruth Stewart in Palm Springs Weekend , a spring break party film set in Palm Springs , California . She also appeared previously in My Three Sons as a friend of Robby cast in the role of Joanne , before the Katie role was created circa 1966 . </P>
who played katie douglas on my three sons
who played katie douglas on my three sons
Tina Cole
Tina Cole