Ever since the duo started to date each other, fans have been less-than-impressed, accusing the pair of staging their romance for the cameras.
Some also suggested that the relationship between the two stars was fake and was actually part of her new music video.
"Well, um. How best to put this? The truth is that Taylor Swift and I are together, and we're very happy. Thanks for asking. That's the truth. It's not a publicity stunt," Hiddleston, 35, told The Hollywood Reporter.
And Hiddleston might even do "it on a whim," because "everything has been so random and spontaneous" with the couple so far.
However, the actor did not comment on those reports.