Gloria Henry ( born Gloria McEniry ; April 2 , 1923 ) is an American actress , best known for her role as Alice Mitchell , Dennis 's mother , from 1959 to 1963 on the CBS family sitcom , `` Dennis the Menace '' .
Gloria Henry ( born Gloria McEniry ; April 2 , 1923 ) is an American actress . She is best known for her role as `` Alice Mitchell '' , Dennis 's mother , from 1959 to 1963 on the CBS family sitcom , `` Dennis the Menace '' .