Mary Chris Wall is an actress, who is best known for the role of Ellen Talbot, the mother of Joe Talbot, on the 1995-1998 children's television show Wishbone that aired on PBS. Mary Chris Wall actually is the biological mother of Jordan Wall, the young actor who plays Joe Talbot. She has appeared in such feature films as Blank Check and Ruby, in which she played Jackie Kennedy. She also has appeared in the 1990 ABC movie Challenger, the Walker, Texas Ranger television series and has more than 250 industrial films and commercials to her credit. Her stage experience includes the Broadway and national touring company of "42nd Street" and regional exposure in Six Women with Brain Death or Expiring Minds Want to Know, Grease and Misalliance. She received her professional training from New York University, London University and the Image Theatre and Studio in New York. She can now be seen in "Get a Mac" commercials as a spokeswoman for "PC." Also has been in a back to school commercial for Walmart in the summer of 2009.