Mary Jane Croft，Diminutive, blond character comedienne whose strident voice and nervy manner made her the perfect foil to Lucille Ball's madcap antics on TV, at first, occasionally, on I Love Lucy (1951) (as "Betty Ramsay" and "Evelyn Bigsby"), then on a regular basis on The Lucy Show (1962) and Here's Lucy (1968) (as "Mary Jane Lewis").