Fereydun Robert "Fred" Armisen (born December 4, 1966) is an American actor, comedian, voice artist, screenwriter, producer, singer, and musician.
 Widely known as a cast member on "Saturday Night Live" from 2002 until 2013, Armisen has portrayed characters in comedy films, including "EuroTrip", "", and "Cop Out".
 With his comedy partner Carrie Brownstein, Armisen is the co-creator and co-star of the IFC sketch comedy series "Portlandia".
 Armisen founded ThunderAnt.com, a website that features the comedy sketches created with Brownstein, and is the bandleader for the "Late Night with Seth Meyers" house band, The 8G Band.
Jerry Vivino (born January 8, 1954 in Paterson, New Jersey) is an American musician.
 He is currently a member of the Basic Cable Band, the house band for the TBS late night program "Conan".
 He was also a member of The Tonight Show Band, the house band on "The Tonight Show with Conan O'Brien" and its predecessor, "Late Night with Conan O'Brien" on NBC.
Paul Shaffer and the World's Most Dangerous Band is an American big band led by Paul Shaffer.
 It is best known for being David Letterman's house band for 33 years.
 The band formed in 1982 to serve as house band for NBC's "Late Night with David Letterman".
 When Letterman moved to CBS and began hosting the "Late Show with David Letterman" in 1993, the band added a horn section and second guitarist, renaming itself (due to an intellectual property dispute with NBC) the CBS Orchestra, a name that lasted until Letterman left the "Late Show" in 2015.
 After a two-year hiatus, in 2017, the band was revived by Shaffer using its original name and released an album titled "Paul Shaffer & The World's Most Dangerous Band", followed by a tour.
David Michael Letterman (born April 12, 1947) is an American television host, comedian, writer, and producer.
 He hosted a late night television talk show for 33 years, beginning with the February 1, 1982 debut of "Late Night with David Letterman" on NBC, and ending with the May 20, 2015 broadcast of "Late Show with David Letterman" on CBS.
 In total, Letterman hosted 6,028 episodes of "Late Night" and "Late Show", surpassing friend and mentor Johnny Carson as the longest-serving late night talk show host in American television history.
 In 1996 Letterman was ranked 45th on "TV Guide"' s 50 Greatest TV Stars of All Time.
Jimmy Vivino (born January 10, 1955) is an American guitarist, keyboard player, singer, producer, and music director.
 He is best known as the leader of Jimmy Vivino and the Basic Cable Band, the house band for the TBS late night program "Conan".
 He was also a member of The Tonight Show Band, the house band on "The Tonight Show with Conan O'Brien" and its predecessor, "Late Night with Conan O'Brien" on NBC.
 Vivino has also played with many rock bands, which most recently has included being a member of Beatles tribute band The Fab Faux.
Late Night with Seth Meyers is an American late-night talk show hosted by Seth Meyers on NBC.
 The show premiered on February 24, 2014 and is produced by Broadway Video and Universal Television.
 It is the fourth incarnation of NBC's long-running "Late Night" franchise.
 The show also stars bandleader Fred Armisen and the 8-G Band, the show's house band.
 "Late Night" is produced by former "Saturday Night Live" producer Mike Shoemaker and executive-produced by Lorne Michaels.
 The show records from Studio 8G at 30 Rockefeller Plaza in New York City.
The following is a list of recurring games, sketches, and other comedy routines from the NBC late night talk show "The Tonight Show Starring Jimmy Fallon", and its predecessor, "Late Night with Jimmy Fallon".
 The sketches feature host Jimmy Fallon, house band The Roots, announcer/sidekick Steve Higgins, the show's writers, celebrity guests, and audience members.
 Most of the skits below appeared only on "Late Night", while some have carried over to the "Tonight Show".
The 8G Band is the house band for "Late Night with Seth Meyers".
 The band is led by "Saturday Night Live" alumnus Fred Armisen.
 He assembled the 8G Band, named for the studio where the show is taped, just two weeks before the test show.
 He texted friends Seth Jabour, Syd Butler and Eli Janney ("What are you guys doing this week?")
, then found first drummer Kimberly Thompson through an audition.
 Guitarist Marnie Stern later joined as well.
 After Thompson left the band, guest musicians frequently sit in often for an entire week.
 Some notable names to sit in on the drum kit include: Patrick Carney, Chad Smith, David Lovering, Kenny Aronoff, Jon Theodore, Nicko McBrain, Matt Sorum, Brad Wilk, Darren King, Danny Carey, Abe Cunningham, Dave Lombardo, Brann Dailor, Jimmy Chamberlin, Matt Cameron, and Abe Laboriel Jr. as well as other guest musicians.
 Additionally singer, guitarist: J Mascis, Bob Mould and others have also sat in with the band.
This is the list of episodes for "Late Night with Jimmy Fallon", an American late-night talk show that aired weeknights at 12:35 am Eastern/11:35 pm Central on NBC in the United States.
 The hour-long show aired from March 2, 2009 to February 7, 2014 and was hosted by actor, comedian and performer Jimmy Fallon, an alumnus of "Saturday Night Live".
 Hip hop/neo soul band The Roots served as the show's house band, and Steve Higgins as the show's announcer.
Jimmy Vivino and the Basic Cable Band is the house band for Conan O'Brien's late-night talk show "Conan" which debuted on November 8, 2010.
 Guitarist and arranger Jimmy Vivino is the group's leader.
 The group was originally formed and led by drummer Max Weinberg in 1993, and played under the name The Max Weinberg 7 when it was the house band for "Late Night with Conan O'Brien" in New York through 2009.
 The band then played under Max Weinberg and The Tonight Show Band during their brief 2009–2010 stint on "The Tonight Show with Conan O'Brien" in Los Angeles.
 They were then briefly known as The Legally Prohibited Band during their participation with O'Brien in the 2010 The Legally Prohibited from Being Funny on Television Tour.

Question: Which American actor that founded Thunderant.com stared in "Late Night" as the bandleader of the show's house band?
Answer: Fred Armisen