Los Supersónicos
In television animation, she played Judy Jetson in all versions of the Hanna-Barbera television series "The Jetsons". Waldo was the last surviving main cast member of the original "The Jetsons" series. In 1964–66, she took over the role of Pearl Slaghoople on "The Flintstones", which was originally played by Verna Felton. Waldo reprised Mrs. Slaghoople on the Flintstones TV films "I Yabba-Dabba Do!" and "Hollyrock-a-Bye Baby" in the 1990s.