The INSIDER Summary:While some Hollywood co-stars become best friends, others end up hating each other.Here are 10 co-stars who are real life best friends, and 10 who hate each other.Hollywood is a land of both friendships and rivalries. For every story of famous co-stars who sparked a special bond, you find an infamous tale of two actors with clashing egos. Study any era of Hollywood, from its golden age to its current mega-blockbuster saturated incarnation, and youll find pairs of stars who both love and despise each other.Public fascination with celebrity BFFs and mortal enemies seems to be of equal fervor. As a society, we seem to find equal satisfaction with the lifelong friendship of Leonardo Dicaprio and Tobey Maguire as we do the bitter feud between"Star Trek"veterans William Shatner and George Takei. We are warmed by the eternal bromances of Rogen and Franco, or Clooney and Pitt, yet we take morbid pleasure in the legendary feud between Bette Davis and Joan Crawford. Whether friends or enemies, theres just something about the exaggerated relationships of larger-than-life Hollywood personalities that keep us fascinated in their world.We live in an era where the stories behind movie productions are creating an industry as big as the film industry itself, but our fascination with the relationships between our favorite stars behind the scenes is hardly anythingnew. So lets take a look back at some of Hollywoods greatest friendships, as well as its most bitter feuds, with10 co-stars who are real-life buddies (and 10 who hate each other).SEE ALSO:James Woods is embroiled in a Twitter brawl over his criticism of Armie Hammer's new film, and his habit of dating younger women20. Enemies: Ryan Gosling and Rachel McAdamsA whole book could be writtenabout movies that produce vicious feuds between their romantic leads. From Marilyn Monroe and Tony Curtis in"Some Like It Hot"to Nick Nolte and Julia Roberts in"I Love Trouble," Hollywood has clocked in its fair share of on-screen romances-turned-behind-the-scenes squabbles. One of the most famous on-screen rifts of recent years was that of Ryan Gosling and Rachel McAdams in"The Notebook." The two had sufficient on-screen chemistry, but it wasnt enough to keep them from having serious issues with one another between takes.According to"Notebook"director Nick Cassavetes, Gosling and McAdams were at serious odds during the making of the movie. Gosling went so far as to ask Cassavetes to start auditioning other actresses to take McAdams place. Fortunately, the director ended up staging an intervention for the two leads, forcing them to getit all out in the open until their conflict was resolved. Production on the film remained rocky, but ultimately, tensions fizzled. The two leads even ended up in an off-screen relationship together for a while.19. Buddies: Sophie Turner and Maisie WilliamsStark sisters Sansa and Arya may not always get along on"Game of Thrones," but their real-life counterparts are true best buds. One brief browse of the social media accounts of either actress will showthat"GoT"stars Sophie Turner and Maisie Williams have a special bond. The pair have been practically inseparable since the day they met, becoming one of the most adorable BFF pairings you could ever hope to see.On screen, the two actresses have been apart for some time, portraying two very separate journeys for their respective characters, both geographically and thematically. The plot surrounding Sansa and Aryas reunion in Season 7 was met with mixed reviews by fans and critics, but theres no doubt that the real-life chemistry between the two actresses bled into their scenes together."Game of Thrones"only has one season remaining, but heres hoping we see Sophie and Maisies real life adventures together for many years to come.18. Enemies: Ryan Reynolds and Wesley SnipesStories of"Blade: Trinitys" troubled productionhave been rolling out for years. Everything from studio overreach to difficulties between director David S. Goyer and star Wesley Snipes seemed to have doomed the third entry in the Blade film series from the start. But the most famous and longstanding tale of"Blade: Trinitys" tricky shoot is the onset feud between Snipes and co-star Ryan Reynolds.Reynolds was far from the only person on the set of"Trinity"to endure abuse from the disgruntled Snipes, who reportedly spent the majority of production smoking marijuana in his trailer and mostly refusing to speak with Goyer. But its his colorful interactions with Reynolds that have gotten the most attention. Snipes was reported to have been disparaging to Reynolds frequently on set, calling him a cracker on more than oneoccasion.See the rest of the story at Business Insider Click here to read full news..