Gary Mule Deer (born Gary Miller) is an American comedian and country musician. During a career spanning four decades, he has performed on every major concert stage in the country, and made over 350 television appearances, including many on both The Tonight Show and The Late Show With David Letterman the hosts of both who he had met early in his career at The Comedy Store in Los Angeles. He was one of six comedians, along with Jay Leno, to star on the first HBO comedy special "Freddie Prinze and Friends", was the co-host of Don Kirshner's Rock Concert for four years on NBC, a regular on Make Me Laugh, and a frequent judge on The Gong Show. He had over 100 appearances on The Nashville Network, including the last two years as a cast member on Hee Haw. He appeared in films such as Annie Hall, Up In Smoke and Tilt. He is currently featured on the DVDs "Jeff Foxworthy's Comedy Classics" and "The World's Greatest Stand-up Comedy Collection" hosted by Norm Crosby. He also has a "Gary Mule Deer Live" CD of his comedy and music. Gary is currently one of the most played comedians on the Clean Comedy Channels of both Sirius and XM Satellite Radio.

David Michael Letterman (born April 12, 1947) is an American television host and comedian. He hosts the late night television talk show, Late Show with David Letterman, broadcast on CBS. Letterman has been a fixture on late night television since the 1982 debut of Late Night with David Letterman on NBC. Letterman recently surpassed friend and mentor Johnny Carson for having the longest late-night hosting career in the United States of America.

Letterman is also a television and film producer. His company Worldwide Pants produces his show as well as its network follow-up The Late Late Show with Craig Ferguson. Worldwide Pants has also produced several prime-time comedies, the most successful of which was Everybody Loves Raymond, currently in syndication.

In 1996, David Letterman was ranked #45 on TV Guide's 50 Greatest TV Stars of All Time.

Letterman was born in Indianapolis, Indiana. His father, Harry Joseph Letterman (April 1915 – February 1973), was a florist of British descent; his mother Dorothy Letterman (née Hofert, now Dorothy Mengering), a Presbyterian church secretary of German descent, is an occasional figure on the show, usually at holidays and birthdays.

The Hager Twins, also known as the Hager Brothers and The Hagers, were a duo of American country music singers and comedians who first gained fame on the TV series Hee Haw. They were identical twin brothers Jim (died May 1, 2008) and Jon Hager (died January 9, 2009).

The brothers were born August 30, 1941 in Chicago, Illinois and adopted by Jack and Frances Hager, a Methodist minister and a schoolteacher.

The Hager brothers first sang in the church choir. As teenagers, they sang on a Saturday morning WGN-TV series targeting others in their age group. Both brothers served in the United States Army and performed at Officers' Clubs and NCO Clubs in the United States and Europe.

They attended Maine Township High School in Park Ridge (Class of 1959), one year ahead of Harrison Ford and a few more years ahead of Hillary Rodham Clinton.

After leaving the military, the Hager brothers moved to California and performed at the Ledbetter's Night Club in Los Angeles with The Carpenters, The New Christy Minstrels, John Denver, Steve Martin and Kenny Rogers. They also worked at Disneyland, which is where Buck Owens saw them perform and signed them to contracts. In addition to Owens, the brothers served as opening acts for Tex Ritter, Wynn Stewart, Billie Jo Spears and Lefty Frizzell.