Gillian Leigh Anderson (born August 9, 1968) is an American actress. After beginning her career in theatre, Anderson achieved international recognition for her role as Special Agent Dana Scully on the American television series The X-Files. Her film work includes The House of Mirth (2000), The Mighty Celt (2005), The Last King of Scotland (2006), and two X-Files films, The X-Files (1998) and The X-Files: I Want to Believe (2008).

Anderson is of English and Irish descent, and was born in Chicago, Illinois, the daughter of Rosemary Anderson (née Lane), a computer analyst, and Edward Anderson, who owned a film post-production company. Soon after her birth, her family moved to Puerto Rico for 15 months; she then lived for five years in Roseberry Gardens, London N4, and finally for 15 months in Albany Road, London N4, so that her father could attend the London Film School. When Anderson was 11 years old, her family moved again, this time to Grand Rapids, Michigan. She attended Fountain Elementary and then City High-Middle School, a program for gifted students with a strong emphasis on the humanities; she graduated in 1986.

David William Duchovny (born August 7, 1960) is an American actor, writer and director. He has won Golden Globe awards for his work as FBI Special Agent Fox Mulder on The X-Files and Hank Moody on Californication.

Duchovny was born in New York City, New York, the son of Margaret "Meg" (née Miller), a school administrator and teacher, and Amram Ducovny (1927–2003), a writer and publicist who worked for the American Jewish Committee. David's paternal grandparents were Jewish emigrants from Ukraine, and his mother is a Lutheran emigrant from Aberdeen, Scotland. His father dropped the h in his last name to avoid the sort of mispronunciations he encountered while serving in the Army.

Duchovny attended Grace Church School and The Collegiate School For Boys; both are in Manhattan. He graduated from Princeton University in 1982 with a Bachelor of Arts in English Literature. He was a member of the Charter Club, one of the university's eating clubs. In 1982, his poetry received an honorable mention for a college prize from the Academy of American Poets. The title of his senior thesis was The Schizophrenic Critique of Pure Reason in Beckett's Early Novels. Duchovny played a season of junior varsity basketball as a shooting guard and centerfield for the varsity baseball team.

Mitchell Craig "Mitch" Pileggi (born April 5, 1952) is an American actor. Pileggi is known for playing FBI assistant director Walter Skinner on the long-running popular series The X-Files. He also had a recurring role on Stargate Atlantis as Col. Steven Caldwell. He appeared in the 2008 film, Flash of Genius.

Pileggi, one of several children, was born in Portland, Oregon, the son of Maxine, a homemaker, and Vito Pileggi, a defense contractor. His family moved frequently because of his father's occupation, and Pileggi lived in Oregon, California, and Texas before spending most of his adolescence in Turkey.

Pileggi was a high school athlete, concentrating on wrestling and football. He attended the University of Texas in Austin, receiving a degree in business. For a while he worked in Iran as a defense contractor, until the 1979 Iranian revolution caused him and his brother to have to flee the country, escaping to Greece.

Pileggi began acting while he was a high school student in Turkey, playing musical theater. After returning to Austin from Iran, he performed in local theaters, and continued his acting career with small roles in B-movies, and guest roles in television shows such as Dallas, China Beach, Code of Vengeance, and Walker, Texas Ranger.