Swift made the announcement Wednesday night on "The Tonight Show with Jimmy Fallon." It will be the pop star's fourth time performing on the show.
Neither Swift nor a Thursday news release gave details about what she plans to perform, but new music is likely as the singer prepares to release a new album. She has a livestream scheduled for Monday, presumably to announce details.
Swift, 24, has an always-memorable relationship with the show, from arriving in a princess carriage to troubles with Kanye West and an on-air hug from Beyonce.
Beyonce, Nicki Minaj, Usher, Iggy Azalea, Ariana Grande and Maroon 5 also will perform on the Aug. 24 MTV broadcast from Los Angeles.
Swift also has a role in the new film "The Giver," which opens in theaters on Friday.