Taylor Swift's Boyfriend Calvin Harris is having a jealous streak. A new report revealed that even the mention of the One Direction singer infuriates him.

Harris is worried that Taylor Swift may still have feelings for her ex, Harry Styles.The superstar DJ is really up in arms about Taylor Swift's ex-boyfriend Harry Styles, if you believe what you read in the tabloids.

Taylor Swift, 25, said she is never ever getting back together with Harry Styles, 21, but her current boyfriend, Calvin Harris, 31 

Calvin Harris wants girlfriend Taylor Swift to stop obsessing over other dudes.

"Calvin has separated himself from his playboy ways, and is all in with his relationship with Taylor," a source told HollywoodLife.com. 

"He doesn't like when she mentions her exes; he wants her to not talk about them even if it is throwing shade at them. He wants her to be totally devoted to him. He gets jealous thinking that she still may have feelings for people like Harry or others she has dated. It's upsetting to him."

The Scottish DJ is reportedly worried that Taylor Swift may still have feelings for her former boyfriend Harry Styles.

Harris made made made his official Instagram account private of criticism from fans of his 25-year-old girlfriend Taylor Swift. But Haylor fans won't stop leaving nasty comments.

Other fans also posted comments saying they'd rather see the the 31-year-old "Feel So Close" pop star in a relationship with 23-year-old model Karlie Kloss.

It started when One Direction fans saw that Swift had liked a Tumblr post that called Styles "immature." 

Hollywood Life reported that Harris doesn't like the mention of Styles's name either on social media or in Swift's music,

 Taylor Swift is renting out Hamilton Island for the day to celebrate a romantic birthday celebration with Calvin Harris and the end of her 1989 World Tour.