The “Hello” star is hosting the latest episode of the US comedy show, 12 years since she first appeared as its musical guest.
She has appeared twice on the show, first in 2008, then again in 2012.
Adele explained on Instagram: “I’ve always wanted to do it as a stand-alone moment, so that I could roll up my sleeves and fully throw myself into it, but the time has never been right.”
She continued: “But if there was ever a time for any of us to jump head first into the deep end with our eyes closed and hope for the best it’s 2020 right?”
But how can you watch Saturday Night Live in the UK?
Fans in the UK will be able to watch the full episode on Sky Comedy and NowTV a day after it airs in the US.
SNL typically uploads clips from the latest episode to its YouTube channel, shortly after airing, as well as to its official social media accounts.
In a sneak preview, Adele was shown demonstrating her American accent, while McKinnon attempted a British one.
In the video, McKinnon attempts to mimic Adele, promising the show is “set to be wicked”, before abruptly halting the impression.
“That was a bad idea,” she says.
In response, Adele puts on a stereotypical Valley Girl accent, saying: “Oh my god, no worries, girlfriend!”
“Now that is good,” McKinnon responded, with HER also looking impressed.
Despite rumours throughout 2020 that Adele would be releasing new music this year, she is not expected to perform during her SNL appearance.
Her latest album, 25, was released in 2015. It received critical praise and went on to win the Grammy Award for Best Album at the 2017 ceremony.
Saturday Night Live airs at 10.30pm CT in the US on NBC. The weekly episodes are also available to stream on Hulu the next day.