Cowell is part of the latest group of presenters at the Emmys, which will air Sunday, Aug. 27 on NBC. Freshly added presenters also include father and son Martin and Charlie Sheen -- who will present together, Bob Newhart, nominee Candice Bergen and Ray Liotta.
Clark is being honored at this year's awards for his long and storied career in television, as the host of the iconic "American Bandstand" (among many other shows) and as a producer whose credits range from "Bloopers" specials to the Golden Globe Awards. This year is also the 50th anniversary of "Bandstand's" premiere as a local show in Philadelphia.
Barry Manilow, who sang and co-wrote the lyrics to the "Bandstand" theme song, will perform during the tribute.
Charlie and Martin Sheen are both nominees this year, Charlie for "Two and a Half Men" and Martin for both "The West Wing" and a guest appearance on his son's sitcom. Bergen is nominated for her work on "Boston Legal" and has won five times in the past for "Murphy Brown."
Liotta and Lithgow are also past winners, and Newhart and Tambor have both been nominated numerous times.