Taylor Swift and Tom Hiddleston Split

Taylor Swift and Tom Hiddleston have called it quits after only 3 months of dating ... TMZ has confirmed.

TayTom became an item in mid-June ... shortly after her split with Calvin Harris ... although some think it started before.

Taylor and Tom got off to a hot start, but there were signs things were fizzling when she was spotted Tom-less in NYC two weeks ago.

US Weekly reported the split. No word yet on who called it off, but we're told it wasn't nasty. Then again, that's what we were initially told with Calvin.