"They have great chemistry," a source told the magazine.
"Sure, they've always agreed to keep things super-casual and private because of their crazy worlds, but Harry genuinely likes Cara a lot – he has done since they met three years ago.
It's not the first time they have been romantically linked.
They were rumoured to be dating back in 2012, shortly before Harry went public with Taylor Swift.
More About Age: 34 Birthplace: Tulsa, Oklahoma, United States of America Profession: Guitarist, Musician, Singer-songwriter, Singer Multi-instrumentalist Also Ranked #34 on People You Can't Believe Got Onstage for the 1989 Tour #13 on The 50 Best Lesbian Singers of All Time costar Jack O'Connell sparked after she uploaded pictures of his neck covered in hickeys.
More About Age: 26 Birthplace: Alvaston, United Kingdom Profession: Actor Credits: 300: Rise of an Empire, Skins, This Is England, Big Night Harry Brown, more In 2014, Cara Delevingne dated actress Michelle Rodriguez.
Including Cara Delevingne’s current boyfriend, current girlfriend, past relationships, pictures together, and dating rumors, this comprehensive dating history tells you everything you need to know about Cara Delevingne’s love life.
But seeing as Katy played a major hand in creating One Direction (she was the final vote that allowed cutie Niall Horan to compete on together in London a few years back, rumors flew that Harry was dating supermodel Cara Delevingne.
When Harry attended a Burberry fashion show Cara was walking in and MTV News UK asked him, "Are you looking forward to seeing your girl Cara walking down the runway?
" Harry shut the rumors, replying, "She's not my girl!
I know what you're doing." Another Harry girlfriend rumor squashed by the man himself.6.
One Direction star Harry Styles has been pictured on a theatre date with model Cara Delevingne.