The superstar DJ is furious about the accusations and took to Twitter to vent his anger, writing: "It's not going to be a 'happy ending' for everyone I sue for defamation of character for all these bullshit stories bye bye."
That echoes what Taylor's publicist tweeted this week, telling fans not to believe the rumour.
Taylor's close friend Selena Gomez, meanwhile, also weighed in during an interview with Sirius radio, saying: "It's so stupid. I'm 'pregnant' every week, she's 'going to be pregnant'. Honestly, it's so stupid, you can't really read that stuff."
The couple have been dating since the start of the year and seem smitten, posting cute photos to Instagram and making everyone use the hashtag #relationshipgoals.
Earlier this year, Calvin said: "It's not even a case of ticking all the boxes, there's boxes that I didn't even know existed she ticks. It's really ridiculous but yeah, she does an incredible barbeque and she's generally an incredible cook and human being."
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