David Yost is best known for portraying Billy Cranston in Mighty Morphin Power Rangers, Mighty Morphin Power Rangers: The Movie, and Power Rangers Zeo.
Yost moved to California with hopes of becoming an actor, and won the part of Billy Cranston (Blue Power Ranger) in the television series Mighty Morphin Power Rangers three months after arriving. He starred in more than 200 episodes of the show's first four seasons. He was the only cast member to appear in every single episode of the original series; his character never changed his colors or passed on his power coins to successors like the rest of the original cast. Yost's most high-profile work was his appearance in Mighty Morphin Power Rangers: The Movie (1995), which took in over $30 million at the box office. The film served as a non-canonical alternate opening for the third season.
After the show ended and Power Rangers Zeo began in the fourth season, Yost stayed on as Billy, but Billy's role within the show changed. Instead of his previous role as a Power Ranger, he became a technical advisor to the others. David has continued to work in the entertainment industry as an actor, a producer & location manager.