Co-creator Casey Kasem hosted the original "AT40" from its inauguration on July 4, 1970, until August 6, 1988. Shadoe Stevens took over the program on August 13, 1988, and hosted until January 28, 1995, when the original program came to an end. Three years later, Kasem teamed up with Premiere's predecessor AMFM Radio Networks to relaunch "AT40". Kasem, who had spent nine years hosting his own countdown Casey's Top 40 for Westwood One, returned to hosting his creation on March 28, 1998. Seacrest took over "AT40" on January 10, 2004, following Kasem's retirement from the series.