"Divergent" may be filled with punches, kicks, and warfare, but Shailene Woodley will be fighting an even bigger battle in a few months in "The Fault in Our Stars."

She'll be fighting to live: freely, beautifully, and, as this exclusive featurette shows, infinitely.

The movie, based on the bestselling novel by John Green, follows teenage cancer patient Hazel Grace Lancaster (Woodley) as she falls in love with cancer survivor Augustus Waters (Ansel Elgort). There are no tightly-fitting black costumes or hair-flying effects.

"It's a love story about two kids with cancer but it's not about cancer," Woodley says in the clip.

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[Related: Shailene Woodley to 'Divergent' Superfan: I Haven't Finished the Books]

"It's full of metaphors and they both accept that this is going to be their only and last love," Elgort, who also appears as Woodley's brother in "Divergent," adds.

If you're thinking this sounds like a weeper, you'd be right. In fact, we recommend you pause this clip around the 50-second point and go grab a tissue. Seriously, you'll need it.

"I cannot tell you how thankful I am for our little infinity," Hazel Grace says with tears running down her face and over her cannula.

"They were just magical together. I've never experienced anything like it," Green says of Woodley and Elgort's chemistry.

[Related: Shailene Woodley Feared a Theo James Knockout Filming 'Divergent']

That much is evident in this video; it's difficult to tell where film footage ends and behind-the-scenes glimpses begin. Is that Ansel and Shailene dancing, or Hazel Grace and Gus?

"I'm glad that it was Shailene that got to be my Hazel Grace and I hope that she's glad that I got to be her Gus," Elgort gushed. "The chemistry between us is so real."

Be prepared to fall in love — and cry your face off — on June 6 when "The Fault in Our Stars" arrives in theaters.

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