Hallie and Annie - The Parent Trap (1998)
Why We Love Them: Lindsay Lohan was on top adorable form playing both Hallie and Annie, the twins who joined forces to reunite their feuding parents, and the movie inspired a generation of girls (and undoubtedly boys) who wiled away hours imagining their very own long lost sibling. Sigh.
They say: "Sisters? Hallie, we're like twins!" Annie James.
Kate and Chloe - Ass Backwards (2013)
Why We Love Them: Released this November, Ass Backwards reminded us that movies driven by two ladies are few are far between.
The critics haven't exactly been blown away by the movie, but we love Kate and Chloe for their resilience, drive and ability to display their genitals without fear or embarassment.
They say: "That kind of co-dependent female friendship, we just find really funny...You have a death pact with one another," Casey Wilson.
Connie and Carla - Connie and Carla (2004)
Why We Love Them: If Some Like It Hot taught us anything, it's that when you accidentally stumble across a Mafia murder and have to go on the run, drag is always the answer.
They say: "Two women who love musical theater met across an ocean from each other and got to make this movie. We just felt that we were lucky every day" says Nia Vardolos.
Cher and Dionne - Clueless (1995)
Why We Love Them: Cher and Dionne are teenage icons. Simple.
They're popular, pretty, and know how to work plaid, but it's their selfless dedication to good causes (like providing makeovers for the cosmetically-challenged) that puts them in our list.
They say: "[Dionne's] my friend because we both know what it's like for people to be jealous of us." Cher Horowitz.
Pauline and Juliet - Heavenly Creatures (1994)
Why We Love Them: Well, you can't complain that they lack loyalty...
Based on a true story, Melanie Lynskey and Kate Winslet star as two besties whose intense friendship leads them to fantasy, obsession and eventually murder.
They say: "The friendship was for the most part a rich and rewarding one, and we tried to honour that in the film," so says director Peter Jackson.
C.C. and Hilary - Beaches (1988)
Why We Love Them: Tissues at the ready. Beaches follows unlikely friends Hilary and C.C. as they tackle career woes, love triangles, unplanned preganancies and terminal illnesses, and it's truly a tale of companionship overcoming all.
They quite literally are the wind beneath each others' wings (we simply couldn't say it better than Bette).
They say: "Bette is very volatile and interesting...I found our differences encouraging, complementary, amusing.” Barbara Hershey.
Thelma and Louise - Thelma & Louise (1991)
Why We Love Them: The ultimate in 'kill or be killed' movies, Thelma and Louise ride together and die together.
Taking BFF loyalty to a whole new level, the girls set out on a two day trip that doesn't go quite to plan, but lets these put-upon ladies live on their own terms for the very first time.
They say: “I just knew I wanted to play one of those parts - I didn't much care which one. I was always attracted to characters who are in charge of their own fate.” Geena Davis.
Romy and Michele - Romy and Michele's High School Reunion (1997)
Why We Love Them: They make their own clothes, they've worked out synchronised dance routines and their diets consist of gummy bears, jelly beans and candy corns. Who wouldn't want to be in their gang?
They're also responsible for making sure no one ever hears Time After Time without thinking of them, and convincing absolutely no one that they invented post-its.
They say: "Let's fold scarves!" Michele.
Annie and Lillian - Bridesmaids (2011)
Why We Love Them: Kristen Wiig and Annie Mumolo's script was crammed full of the rarest of cinematic sights: real, believable women.
Annie and Lillian may have complex relationships with men to manouvre, but it's the ups and downs of their friendship that drives the entire movie.
They can also do uncanny impressions of a penis, so y'know. Go figure.
They say: "We wanted to play with the real exchanges between women and the real emotions that come into play in friendships," said writer Annie Mumolo.
Becky and Enid - Ghost World (2001)
Why We Love Them: The undisputed teenage queens of snark, Becky and Enid are two girls that hate everything and everyone except each other.
It's not hard to see why this far-from-dynamic duo carried the movie to cult status.
They say: "Most of the teenage parts don’t have any depth...The characters in Ghost World were awesome, but that’s rare,” says Scarlett Johansson.