Taylor Swift gave a preview of what’s to come with her upcoming album, telling a packed house in Melbourne she was “lonely” during the quarantine … and it’s a clear shot at Joe Alwyn.

Just before TS sang “Betty” — a song written during the pandemic — she painted herself as a “ghostly Victorian lady” … joking it was a departure from a “lonely millennial woman covered in cat hair, drinking my weight in white wine.”

Joe co-wrote some of the songs on the album — “Folklore” — and also helped produce it.

The fact that she described herself as lonely speaks volumes, and forecasts what she’ll sing about in her soon-to-be-released album “The Tortured Poets Department.” Fans expect her to scorch Joe, with whom she broke up in April, 2023.

Taylor’s had a tough week … a 16-year-old fan died a few days ago en route to her Eras concert in Melbourne. And, as you know, she’s been a huge Kansas City Chiefs booster, and donated $100k to the family of the woman who was shot and killed after the Super Bowl parade shooting.

Unclear when Travis Kelce will join her on the tour.