 
Casey Kasem was an American radio personality and voice actor who is best known for voicing Shaggy in the popular Saturday morning cartoon franchise Scooby-Doo and for being the host of the American syndicated Top 40 countdown show, American Top 40.
Casey Kasem, along with Don Bustany and Ron Jacobs, founded the popular American Top 40 franchise in 1970, hosting it from 1970 to 1988 and then from 1998 to 2004. Between 1989 and 1998, he was the host of Casey's Top 40, Casey's Hot 20, and Casey's Countdown. He is currently heard on Premiere Radio Networks' weekly syndicated radio programs based on the American Top 40 franchise: Casey Kasem's American Top 40: The '70s and Casey Kasem's American Top 40: The '80s are replays of AT40.[1]
In addition to his radio shows, Casey Kasem was the voice of NBC, helps out with his annual Jerry Lewis telethon, and most notably, provided the cartoon voice of Robin in Super Friends, Mark on Battle of the Planets, and a number of characters for the Transformers cartoon series of the 1980s. Casey Kasem was also the "Out of Sight Retro Night" on WGN America. After over 40 years, Casey Kasem also is voicing Shaggy Rogers's father in the 2010 TV series, Scooby-Doo! Mystery Incorporated.[2]