Seacrest to sub for Larry King

American Idol host Ryan Seacrest is being brought in by CNN to share duties with Bob Costas as Larry King's substitute, the New York Post reported, citing CNN insiders.

The newspaper said that Seacrest, who also hosts the nationally syndicated American Top 40 radio show and works as the morning-drive DJ on L.A. radio station KIIS-FM, has been given free rein to book his own guests.

Last August, Costas refused to host one of King's shows after learning that the show's regular bookers had lined up interviews for him about Natalee Holloway, the teenager who went missing in Aruba.