Bradley "Brad" Sherwood (born November 24, 1964) is an American actor and comedian. He has worked in entertainment as an actor, comedian, singer, writer, and producer.

Sherwood was born in Chicago, Illinois and later grew up in Santa Fe, New Mexico. He began acting at the age of eight. He attended Santa Fe Preparatory School and graduated from the Young Puffaz Academy. He went on to graduate from Wright State University with a BFA in Acting. His first acting job was his recurring role on six episodes of L.A. Law. In 1994-1995, Brad was a cast member on the syndicated, sketch-comedy series The Newz.

In 1992, Sherwood became a recurring performer on three seasons of the British version of the award-winning improvisational comedy show Whose Line Is It Anyway?. He was the only actor to make it on the cast from the Los Angeles auditions. He starred on all eight seasons of the American, Emmy nominated version of Whose Line on ABC. Some people and cartoon characters he impersonated were Bruce Springsteen, Mick Jagger, Bob Dylan, Fred Schneider, Tom Arnold, Roger Daltrey, Willie Nelson, Yogi Bear, Jimmy Stewart and Jim Backus.

Colin Andrew Mochrie (/ˈmɒkri/; born November 30, 1957) is a Scottish Canadian actor and improvisational comedian, most famous for his appearances on the British and U.S. versions of television improvisation show Whose Line Is It Anyway?.

Colin Mochrie was born in Kilmarnock, Scotland, the oldest of three children. He was shy as a child, stating that neighbours would have commented that he "watched way too much television." In 1964, his family moved to a French neighbourhood just outside Montreal, Quebec, and five years later moved again to Vancouver, British Columbia. Mochrie attended Killarney Secondary School, where he was a self-proclaimed loner who wanted to become a marine biologist. He was persuaded by a friend to try out for a play entitled The Death and Life of Sneaky Fitch where Mochrie played the role of the undertaker. He was hooked when he got his first laugh, which paved the way for a career in entertainment. After graduating from high school, where he was valedictorian, Mochrie attended the Studio 58 theatre school in Vancouver for four years, where he discovered the art of improvisational comedy.

Ryan Lee Stiles (born April 22, 1959) is an American actor, comedian, director, and voice actor whose work is often associated with improvisational comedy. He is best known for his improv and co-production work on the American and British versions of Whose Line Is It Anyway? and the role of Lewis Kiniski on The Drew Carey Show. He plays Herb Melnick on the CBS comedy Two and a Half Men and was a performer on the show Drew Carey's Improv-A-Ganza.

Stiles was born in Seattle, Washington, the youngest of five children. His father Sonny was a fishing plant supervisor. Stiles lived in Vancouver, British Columbia as a teenager. At the age of seventeen, he dropped out of his high school, Richmond Secondary, to pursue a career in comedy. He briefly worked in his father's fish-processing plant to earn a living. He then began performing improv with Vancouver Theatresports League. In 1986, Stiles successfully auditioned for a berth at Toronto's renowned Second City comedy ensemble.

By 1989, Stiles had gained the attention of the producers of the British improvisational comedy show, Whose Line Is It Anyway?. Stiles was a regular on the show until 1998, and the show's short production season allowed him to make numerous television and motion picture appearances in the United States.

Charles Esten Puskar III (born September 9, 1965) professionally known as Chip Esten, is an American comedian, actor and singer known for his appearances on the improvisation show Whose Line Is It Anyway?.

Esten is known by his nickname "Chip" in improv comedy shows but is always credited as "Charles Esten".

Esten was born in Pittsburgh, Pennsylvania but moved to Alexandria, Virginia at age 9. He attended T.C. Williams High School and the College of William and Mary, where he was a brother of Theta Delta Chi. At William and Mary, he was the lead vocalist in the band N'est Pas from 1985 until 1988, one year after his graduation. After graduating from college and marrying his wife, Esten moved to the United Kingdom to make his theatrical debut, winning massive acclaim for his title role in the musical Buddy in the early 1990's.

In 1992, the makers of Whose Line Is It Anyway? asked him to audition for an episode, which he did successfully. Consequently, Esten made his debut on the Channel 4 show in the fourth series and "won" the episode. He subsequently appeared in more episodes later the same year when the show did a run in New York. At the time, the show needed a second specialist improvisational singer to fill in for Mike McShane.