Although Game of Thrones is most definitely an ensemble series, two characters in particular sparked fans' imaginations during the seventh season—specifically bearded wildling Tormund Giantsbane, played by Kristofer Hivju, and the long-legged sentinel of iron-plated justice Brienne of Tarth, played by Gwendoline Christie. Why? Because of the palpable sexual tension between the pair, mostly driven by Tormund's open affection for Brienne.
According to Christie, the original script only called for a brief, unreciprocated flirtatious glance from Tormund to Brienne. Hivju decided to some have fun with the prompt, though, and instead hungrily eyed Christie with so much lust she admitted to feeling genuinely surprised by the "magnitude of intense sexual intention to pour out of [that] man's eyes."
Producers evidently loved Hivju's take, and the actor has since taken it a step further, continuing to hungrily leer at Christie even when they're not shooting. He reportedly attempted to woo her by sensually eating a sandwich while maintaining unflinching eye contact in full costume between takes. Which, to be fair, sounds exactly like something Tormund would do.