From the Super Mario Wiki
Jeannie Elias (also known as Jeanie Elias) is a Canadian voice and film actress. She was born August 23, 1954 in Montreal, Quebec. Jeannie Elias portrays Princess Toadstool, Birdo, and Shy Guy in The Super Mario Bros. Super Show!. She worked on the show starting in 1989 and left the same year.