And he has been repeatedly asked by fans about the whereabouts of Swift's scarf she mentions in the song.
"I left my scarf there, at your sister's house, and you've still got it, in your drawer even now."
And now Gyllenhaal has publically addressed the song in a new interview, talking about how he feels about the song and also about his opinion on cyberbullying.
via GIPHY
"It has nothing to do with me. It's about her relationship with her fans," he told Esquire when asked about the track.
"It is her expression. Artists tap into personal experiences for inspiration, and I don't begrudge anyone that."
Gyllenhaal was also asked about his thoughts on online hate. He switched off his Instagram comments late last year in line with the re-release of the track, E! News reports.
"At some point, I think it's important when supporters get unruly that we feel a responsibility to have them be civil and not allow for cyberbullying in one's name," he said.
"That begs for a deeper philosophical question. Not about any individual, per se, but a conversation that allows us to examine how we can—or should, even—take responsibility for what we put into the world, our contributions into the world."