The "Dark Horse" hitmaker made the shock announcement during a red carpet interview with Entertainment Tonight at the iHeartRadio Music Awards on Thursday, March 14.
When asked about rumours that she might eventually make music with the Look "What You Made Me Do" songstress, Perry coyly suggested that a collaboration was a possibility.
"I mean, I'm making music with Zedd, (so) I'm open," she smiled.
Perry walked the red carpet alongside her "365" collaborator Zedd, dressed in the same android-style outfit she wore in the music video for their song.
Alluding to her guise, the DJ quipped that he had re-programmed her while the pair worked together.
"I programmed her to make music with anybody, it's great," he laughed, with Perry joking: "I'm a loveable AI."
The duo reportedly fell out after three backing dancers left Swift's "Red Tour" early to join Perry's "Prism" trek in 2014.
In May 2018, the "Swish Swish" singer mailed Swift a literal olive branch to commemorate the opening night of her "Reputation Stadium Tour", alongside a note referencing their past animosity and expressing her wish to move on.
"Hey old friend, I've been doing some reflecting on past miscommunications and the feelings between us," she wrote. "I really want to clear the air."
Her pop rival subsequently shared a video of herself receiving the gesture on Instagram.
"So, I just got back to my dressing room and found this actual olive branch," she shared. "This means so much to me."