Even if Harry Styles and Taylor Swift already parted ways, the One Direction crooner appears to still be concerned over the "Red" songstress. The 21-year-old singer allegedly disliked how former band mate Zayn Malik engaged in a Twitter row with Calvin Harris, the blonde singer's current beau.

"Harry's kind of worried about Zayn after his Twitter rants," said an insider to Hollywood Life. "He thought Zayn's diss to Taylor was uncool and passive aggressive."

The source went on to say that the "Drag Me Down" singer might not want to reunite with Zayn Malik for a project.

"He thinks this may be the beginning of Zayn spiraling out of control after ending things with Perrie. His rants are not a good sign at all, and this won't be good for him professionally either. At this point, 1D would never want a reunion with him because he's just too toxic."

As per the publication's tipster, Zayn Malik was not in favor of Harry Styles and Taylor Swift's romance. Back when they were dating, the "I Won't Mind" crooner allegedly thought that the songstress acts "like she was better than everyone."

Harry Styles and Taylor Swift broke up in January 2013.

It is believed that the latter penned the songs "Style" and "Out of the Woods" for the 1D crooner. Fans were also quick to speculate that the paper airplane necklace featured in the "Style" music video was the one given by the "Night Changes" singer.

The same publication also reported that Perrie Edwards is not happy with Zayn Malik's recent penchant for making enemies. The Little Mix songstress allegedly disliked how her ex-fiancé dissed the "I Knew You Were Trouble" singer who's an "absolute sweetheart in her eyes."

"She's also kind of pleased that now others can see what a jerk he can be and what she had to put up with. Perrie knows he's good at making enemies and always told him not to burn his bridges," said the source.