Fallon follows other celebrity personalities, including Sarah Silverman, who apologised for an inappropriate comedy in the past amid public backlash.
Meanwhile, the whole issue resurrected another blackface uproar that exploded earlier this month about Ben Stiller's 2008 Hollywood parody Tropic Thunder, which portrays Robert Downey Jr. as a film actor so devoted to method performance that he gets a "pigmentation alteration" operation to portray an African-American character in a Vietnam War movie.
Watch: Megyn Kelly Talks Robert Downey Jr.'s Blackface
The Iron Man star was awarded Best Supporting Actor for his over-the-top role and supported the film in a January interview on The Joe Rogan Experience.
“Ninety percent of my black friends were like, ‘Dude, that was great,’” Downey Jr. remarked on the podcast, adding: “It's an interesting and necessary meditation on where is the pendulum? ... You know, there's a morality clause here on this planet and it's a big price to pay and I think having a moral psychology is job one. Sometimes, you just gotta go, 'Yeah, I [f*****] up.' Again, not in my defense, but Tropic Thunder was about how wrong that is."