Swift herself made the announcement in a short video that played in Times Square during "GMA" on Wednesday.
The surprise announcement comes as the "Good Morning America" Summer Concert Series is well underway. Still ahead are concerts with Pitbull, Chance the Rapper and more.
Details have not yet been revealed about how to attend Swift's big concert, but for some of the other Central Park concerts this summer, you can request free tickets here.
The concert will come just one day before Swift's new album, "Lover," gets released on August 23. The new album includes singles "Me" and "You Need To Calm Down."
The video in the player above is from a previous story about Taylor Swift's 'You Need to Calm Down' music video.