American Top 40
|Genre||Music Chart Show, Talk|
|Running time||4 hrs. (including commercials)|
|Country of origin||United States|
|Home station||KIIS-FM (Los Angeles CA)|
|Hosted by||Ryan Seacrest (2004–present)|
|Created by||Casey Kasem, Don Bustany, Tom Rounds, and Ron Jacobs|
|Produced by||Produced by
Easton Allyn & Jennifer Sawalha (Present) Nikki Wine (1970s) Don Bustany (1970s, 1979-1987)Lorre Crimi (1998-2004)
|Original release||July 4, 1970 – present (hiatus January 28, 1995-March 28, 1998) – present|
The program is currently hosted by Ryan Seacrest and presented as an adjunct to his weekday radio program, On Air with Ryan Seacrest.
Hip hop music was played on the AT40 mostly in the late 1980s and 1990s. It continues now.
In the 1970s, disco music aired on AT40.