High Quality Content by WIKIPEDIA articles! Pamela Baird (also credited as Pamela Beaird and Pamela Beard) is an American former actress, best known for her role as "Mary Ellen Rogers", the girlfriend of "Wally Cleaver" on the classic sitcom, Leave It to Beaver. She appeared in seven of the show`s 235 episodes. but her name was mentioned in many other segments. Mary Ellen and Wally eventually wed, as they were shown as a married couple in the 1983 reunion movie Still the Beaver and the subsequent The New Leave It to Beaver series (in which Janice Kent played Mary Ellen).