Keegan-Michael Key played the character of Mark.
 There was also "Jovan Muskatelle", a shirtless man with a jheri curl and a shower cap who interrupts live news broadcasts by a reporter (always played by Ike Barinholtz), annoying him with rapid-fire accounts of events that have happened frequently exclaiming "It was crazy as hell!" Celebrities that Key impersonated on the show include Ludacris, Snoop Dogg, Roscoe Orman (as his character Gordon from Sesame Street), Matthew Lillard, Bill Cosby, Al Roker, Terrell Owens, Tyler Perry, Keith Richards, Eddie Murphy (as his character James "Thunder" Early from the movie Dreamgirls), Sherman Hemsley (as his character George Jefferson on The Jeffersons), Charles Barkley, Sendhil Ramamurthy (as Mohinder Suresh), Tyson Beckford, Seal (originally played by Peele until Peele left the show at the end of season 13), Sidney Poitier, Lionel Richie, Barack Obama, Kobe Bryant and Jack Haley (as the Tin Man from The Wizard of Oz)
Key was involved in audio episodes for the marketing campaign, "Hunt the Truth" on the website for the video game Halo 5: Guardians, voicing a fictional journalist and war photographer named Benjamin Giraud, who investigates the Master Chief's background

