Back in September 2012, One Direction's Harry Styles was rumored to be dating Cara Delevingne just before he went public with Taylor Swift, but now it seems like the couple rekindled the flame once again.

Last week, Styles and Delevingne were spotted watching "Book Of Mormon" together in London.

Pictures of the pair looking cozy at the West End theatre have surfaced along with reports that they have been secretly "hooking up" for months, according to the Daily Mail.

The photos shows the "This is Us" star and the model sitting side by side with Styles on his phone while Delevingne sips on her drink.

Look magazine reported that when the lights dimmed the two shared a couple of laughs and whispered in each other's ears.

A source told the magazine, "They have great chemistry. 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 ever since they met three years ago."

The insider added, "They've actually had an on/off thing going all this time when they're in the same city, but they've never had the chance to give a real relationship a shot. I can't imagine she wants to join the list of women who have been Harry'd."

However, the blonde beauty is said to be cautious with her heart when it comes to Harry Styles. Even though the singer has shown her that he cares, such as supporting her back in 2012, sitting front row at her Burberry fashion show, he has burned her before.

A source revealed, "Of course he might profess his love for her - and he has done that on many occasions - but she's heard it all before. He said that to her just a month before he went public with Taylor, so I imagine she's learned her lesson."

Whether this romance will last this time around is uncertain. Delevingne recently told Industrie Magazine, "I'm done with boys, they're so annoying, all they care about is their willies. I want to behave more like a boy."

She added, "I want to be the strong one. People see me being a crazy b**** but I'm the opposite inside."

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