In addition to interviewing Jimmy Fallon on "Late Night" on Wednesday, Zach Galifianakis had an equally eventful appearance on "The Late Show With David Letterman."

In fact, this just might be a first in all of "Late Show" history.

Although he was there to promote his upcoming election movie with Will Ferrell, "The Campaign," Zach's interview was hardly as exciting as his fashion emergency involving "Late Show" band leader Paul Shaffer.

After getting in the way of Letterman's hot weather water prank (you can watch that below), Zach was forced to change into his back-up suit: a dapper, pastel yellow get-up with tiny, matching sunglasses. Sound like anyone you know?

ALSO WATCH: Letterman's water prank



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    HOLLYWOOD, CA - AUGUST 02: Actors Zach Galifianakis (L) and Will Ferrell arrive at the premiere of Warner Bros. Pictures' 'The Campaign' at Grauman's Chinese Theatre on August 2, 2012 in Hollywood, California. (Photo by Kevin Winter/Getty Images)

  • Will Ferrell & Zach Galifianakis Promote 'The Campaign'

    HOLLYWOOD, CA - AUGUST 02: Actors Zach Galifianakis (L) and Will Ferrell arrive at the premiere of Warner Bros. Pictures' 'The Campaign' at Grauman's Chinese Theatre on August 2, 2012 in Hollywood, California. (Photo by Kevin Winter/Getty Images)

  • Will Ferrell & Zach Galifianakis Promote 'The Campaign'

    WASHINGTON, DC - July 31: Will Ferrell and Zach Galifianakis joke around as they attend 'The Campaign' premiere at The Newseum on July 31, 2012 in Washington, DC. (Photo by Larry French/Getty Images)

  • Will Ferrell & Zach Galifianakis Promote 'The Campaign'

    CHICAGO, IL - JULY 18: Will Ferrell (L) and Zach Galifianakis read the starting lineup for the Chicago Cubs before their game against the Miami Marlins at Wrigley Field on July 18, 2012 in Chicago, Illinois. (Photo by Brian Kersey/Getty Images)

  • Will Ferrell & Zach Galifianakis Promote 'The Campaign'

    CHICAGO, IL - JULY 18: Zach Galifianakis (C) and Will Ferrell (L) stand on the field before throwing out a ceremonial first pitch to Ryan Dempster #46 of the Chicago Cubs before the game against the Miami Marlins at Wrigley Field on July 18, 2012 in Chicago, Illinois. (Photo by Brian Kersey/Getty Images)

  • Will Ferrell & Zach Galifianakis Promote 'The Campaign'

    LOS ANGELES, CA - JULY 17: Actors Zach Galifianakis and Will Ferrell attend the press conference for the launch of Warner Bros. Pictures' 'The Campaign' Whistle Stop Tour, held at The Grove on July 17, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Will Ferrell & Zach Galifianakis Promote 'The Campaign'

    Actors Will Ferrell, right, and Zach Galifianakis attend a special screening of "The Campaign" at the Sunshine Landmark Theatre on Wednesday July 25, 2012 in New York. (Photo by Evan Agostini/Invision/AP)

  • Will Ferrell & Zach Galifianakis Promote 'The Campaign'

    Zach Galifianakis and Will Ferrell attend "The Campaign" photo-op at the Grove on Tuesday July 17, 2012, in Los Angeles, CA. (Photo by Todd Williamson/Invision/AP)

  • Will Ferrell & Zach Galifianakis Promote 'The Campaign'

    Actors Will Ferrell, left, and Zach Galifianakis attend the press line for "The Campaign" during Comic-Con, Saturday, July 14, 2012, in San Diego. (Photo by Matt Sayles/Invision/AP)