Serving as the musical guest for their Nov. 13 live show, Swift sang her first live rendition of the 10-minute version of All Too Well from the rerecording of her 2012 album Red.
With a live band and supporting vocals by her side, the artist took the New York stage by storm with the song she wrote when she was 22 and going through a breakup with actor Jake Gyllenhaal.
After the performance, Swift was met with cheers and a standing ovation from the crowd. The 10-minute song sets the record for the longest musical performance in SNL history.
Before the show, Taylor was met with support from fellow celebrities and friends, Blake Lively, Ryan Reynolds, Joe Jonas, and Anya Taylor-Joy, who were among the crowd.
Swift also celebrated the night through a TikTok video with one of her longtime friends, Selena Gomez.
The 15-second video sees Swift lipsyncing to the TikTok audio "Oh no, my bestie is a bad bi---" before panning the camera to Gomez, who laughs along to the sound.
A day after the release of Red (Taylor's Version), Swift also dropped a short film for All Too Well (Taylor's Version) starring Dylan O'Brien and Sadie Sink. It garnered over 27 million views two days after its release.
Meanwhile, Red (Taylor's Version) has already broken a number of records since its Nov. 12 release. It broke the record for Spotify's most-streamed album in a day by a female and made Swift the most-streamed female artist in a single day.