Question: Who was a cast member on Saturday night live, the late show and the tonight show?

Context articles: Celebrity Jeopardy! (Saturday Night Live)
Steve Higgins
Tonight Live with Steve Vizard
Ellen Cleghorne
Saturday Live (Irish TV series)
List of Saturday Night Live episodes
Herb Sargent
Late Night (TV series)
Gregory Aull
Jimmy Fallon

Celebrity Jeopardy! is a series of sketches that aired regularly on the television comedy/variety show "Saturday Night Live" between 1996 and 2002, the years when Will Ferrell was a cast member.
 It parodies the same-named special event on the television quiz show "Jeopardy!" that features competition between notable individuals with all winnings going towards charitable organizations, and significant reductions to the game's level of difficulty.
 Fifteen sketches aired between December 1996 and February 2015: two sketches per season from 1996 to 2002, when Ferrell was a regular on the show; and one each in 2005 and 2009, when Ferrell returned to the show as host.
 The sketch was revived for the "Saturday Night Live 40th Anniversary Special" on February 15, 2015.
Steve Higgins (born August 13, 1963) is an American writer, producer, announcer, actor, and comedian.
 He currently serves as the announcer of "The Tonight Show Starring Jimmy Fallon" and as a writer and producer of "Saturday Night Live".
 Prior to "The Tonight Show", Higgins was also the announcer for "Late Night with Jimmy Fallon" from 2009 to 2014.
Tonight Live with Steve Vizard was a nightly Australian comedy chat show broadcast on Seven Network in Australia.
 It was a one-hour live studio based show broadcast nationally 5 nights a week from 29 January 1990 to 26 November 1993, usually commencing at 10:30 pm every week night.
 Presented by Australian lawyer,comedian and writer Steve Vizard, the show's format was an eclectic mix of a traditional Tonight Show, such as the Late Show with David Letterman, The Tonight Show with Johnny Carson or Jay Leno, In Melbourne Tonight with Graham Kennedy with more off-beat, often deconstructionist elements, such as broadcasting a rehearsal of the show, a rained out show, a parallel Tonight show, using the floor manager and cameramen as on air talent, using the studio audience to replace high-profile guests and the like.
Ellen Cleghorne (born November 29, 1965) is an American actress and comedian, best known as a cast member of "Saturday Night Live" from 1991 to 1995.
 Cleghorne was the sketch comedy show's second African-American female repertory cast member, succeeding Danitra Vance in its eleventh season, and the first African-American female cast member to stay for more than one season.
 She returned for its 40th anniversary special on February 15, 2015.
 Cleghorne was ranked the 69th greatest "Saturday Night Live" cast member by "Rolling Stone" magazine.
Saturday Live is a televised talk show hosted by various guest presenters and broadcast live on Saturday nights.
 The show was broadcast during the autumn-spring season (October - April) and was created to fill the vacant Saturday night slot after the departure of "The Late Late Show" from Saturday to Friday nights.
 It was first broadcast on RTÉ One on Saturday 25 October 1986.
 "Saturday Live" featured guest interviews and live music from guest music groups and featured a mix of serious discussion and light chat aimed at a younger audience than its main rival, "The Late Late Show".
 The original programme ended on 11 April 1988.
<section begin=head />"Saturday Night Live" ("SNL") is a late-night sketch comedy and variety show created by Lorne Michaels.
 It premiered on NBC, a terrestrial television network, on October 11, 1975 under the title "NBC's Saturday Night".
 The show often satirizes contemporary American popular culture and politics.
 "Saturday Night Live" features a two-tiered cast: the repertory members, also known as the "Not Ready for Prime-Time Players," and newer cast members, known as "Featured Players."
 Each week, the show features a host, often a well-known celebrity, who delivers an opening monologue and performs in sketches with the cast.
 A musical guest is also invited to perform several sets (usually two, and occasionally more).
 Every so often a host or musical guest will fill both roles, such as was the case with Britney Spears in 2000 and 2002, Jennifer Lopez in 2001 and 2010, Justin Timberlake in 2003, 2006 and 2013, Taylor Swift in 2009, Bruno Mars in 2012, Lady Gaga in 2013, Miley Cyrus in 2013 and 2015, Drake in 2014 and 2016, Blake Shelton in 2015, and Ariana Grande in 2016.
 With the exception of Season 7 and several other rare cases, the show has begun with a cold open that ends with someone breaking character and proclaiming "Live from New York, it's Saturday Night!
"
Herbert Sargent (July 15, 1923 – May 6, 2005) was an American television writer, a producer for such comedy shows as "The Tonight Show" and "Saturday Night Live", and a screenwriter ("Bye Bye Braverman").
 During his tenure at "Saturday Night Live", he and Chevy Chase created Weekend Update, the longest-running sketch in the show's history, and one of the longest running sketches on television.
Late Night is an American late-night talk and variety show airing on NBC since 1982.
 Four men have hosted "Late Night": David Letterman (1982–93), Conan O'Brien (1993–2009), Jimmy Fallon (2009–14), and Seth Meyers (2014–present).
 Each iteration of the show was built around its host, and maintained distinct identities aside from the title.
 The longest-serving host to date was O'Brien, who hosted "Late Night with Conan O'Brien" for 16 years, from September 1993 to February 2009.
Gregory Aull (born February 15, 1961, Brooklyn, New York, United States) is currently the American technical director for "The Tonight Show with Jimmy Fallon" on NBC.
 He has also worked in various technical capacities for Howard Stern, "Saturday Night Live", Rosanne Barr and Conan O'Brien.
 For his efforts he has received 10 Emmy Award nominations including one win with "Saturday Night Live".
James Thomas Fallon (born September 19, 1974) is an American comedian, actor, television host, and musician.
 He is known for his work in television as a cast member on "Saturday Night Live" and as the host of late-night talk show "The Tonight Show Starring Jimmy Fallon".
 He was born in Bay Ridge, Brooklyn and raised in Saugerties, New York.
 He grew up with an interest in comedy and music, moving to Los Angeles at 21 to pursue stand-up opportunities.