It's a battle of might between two rising stars from opposite sides of the Atlantic as Chris Pine and Tom Hardy come head to head in 'This Means War'.<br/> The two men play best friends and CIA agents in the romantic action comedy.<br/> But when they discover they're dating the same woman, this fists are drawn and all-out war ensues.<br/> But if it ever came to a real-life fight, who would win?<br/> SOUNDBITE: Tom Hardy, actor, saying (English):<br/> "Oh come on. Chris, without a shadow of a doubt."<br/> REPORTER SAYING: "Why?"<br/> HARDY, SAYING: "He's a big guy. Have you seen him?"<br/> REPORTER: "You're a big guy too!"<br/> HARDY, SAYING: "Nah I wouldn't want to fight him."<br/> SOUNDBITE: Chris Pine, actor, saying (English):<br/> "Ha, I think Tom's being very gracious. I think Tom would annihilate me."<br/> REPORTER ASKING: "Why?"<br/> PINE, SAYING: "Tom is a martial arts educated man. I think he knows his way around the ring better than me."<br/> Their director McG is certain which corner he'd be in.<br/> SOUNBDITE, McG, director, saying (English):<br/> "Clearly Tom Hardy. I mean I love me some Chris Pine but Tom's a killer."<br/> Hardy actually played a real-life serial killer in his breakout role, gaining 35 pounds of muscle to portray Charles Bronson.<br/> His next part is another brutal murderer -- this time an entirely fictional one, one of Batman's fiercest enemies, Bane, in 'The Dark Night Rises"<br/> So romantic comedy marks something of a departure.<br/> SOUNDBITE: Chris Pine, actor, saying (English):<br/> "I was really excited to work with Reese actually and Chris and (director) McG and try my hand at something I've never done before, which is a bit of comedy. I mean if it doesn't work, it doesn't work and I'll go back to playing nutcases."<br/> Reece Witherspoon plays the object of both men's affections and said they are completely contrasting characters in real life.<br/> SOUNDBITE: Reece Witherspoon, actress, saying (English):<br/> "They've got that whole LA-London vibe going on so they're very, very different. Tom's very intense and Chris is more light but they're both incredible actors."<br/> 'This Means War" is released in the US on Valentine's Day and in the UK in March.<br/> Edward Baran, Reuters.