The duo was photographed arm in arm in New York City on Tuesday night.
Turner's appearance comes amid her divorce from Joe Jonas, which made headlines earlier this month. The "Game of Thrones" actress' husband filed for divorce from her in early September after four years of marriage.
The former couple, who share two daughters, issued a statement at the time, saying, "There are many speculative narratives as to why but, truly this is a united decision and we sincerely hope that everyone can respect our wishes for privacy for us and our children."
Turner and Swift's appearance together delighted fans, given that Swift's fans know the singer famously dated Jonas briefly in 2008.
Swift famously claimed on "The Ellen DeGeneres Show" that Jonas broke up with her over a 25-second phone call.
Turner and Swift have been friendly for years. Turner shared a screenshot of Swift's hit "Mr. Perfectly Fine (Taylor's Version)" when it dropped in 2021, to which Swift responded, writing, "Forever bending the knee to the 👑 of the north," according to People.
Jonas, meanwhile, is currently on his global tour with the Jonas Brothers, called "The Tour." It runs through 2024.