American Idol (season 8) was hosted by Ryan Seacrest.
American Idol (season 8) . Judges Simon Cowell , Paula Abdul , and Randy Jackson continued to judge the show 's contestants , along with Ryan Seacrest as host . Ryan Seacrest . He is best known for hosting the talent competition show American Idol , as well as the syndicated countdown program American Top 40 and the KIIS-FM morning radio show On Air with Ryan Seacrest .