The Parent Trap (1998)
The Sister: Lindsay Lohan pulls double duty on this sweet-natured kids movie, playing a pair of identical twins striving to reunite their separated parents. They're meddlers, essentially, but their hearts are in the right place.
Sibling Rivalry: They're too busy getting their scheme on to get bogged down by any petty squabbling.
The Sister: Lucilla, daughter of Marcus Aurelius and sister to the villainous Emperor Commodus, who harbours an unsettling sexual desire for his sibling. no wonder she's only too happy to help Maximus attain his revenge, then…
Sibling Rivalry: When Commodus suspects her betrayal, he forces the truth from her by threatening her son, his nephew. No amount of therapy is going to patch this one up.
Cold Weather (2010)
The Sister: Gail and Cris are like any pair of brother and sister: they get on each other's nerves, but are essentially there for each other when the ging gets tough. So when Cris decides to investigate the disappearance of his ex-girlfriend, Gail is on hand to help with the search. An odd thing to bond over, but there we are…
Sibling Rivalry: A brother and sister moving in together in their thirties is always going to be a recipe for tension, but once the investigation gets underway, the pair make a pretty good team!
Hannah And Her Sisters (1986)
The Sister: Long-suffering in the extreme, Hannah is forced to endure her sisters sleeping with her husband and ex-husband respectively, before having the graphic details of her personal life become the inspiration for one of their plays. Its a wonder she doesn't kill either of them!
Sibling Rivalry: Understandably, the sister-swapping exploits of her various lovers doesn't exactly make things comfortable at home...
The Railway Children (1970)
The Sister: Jenny Agutter is heartbreakingly charming in this adaptation of the classic children's story by E. Nesbit, adopting a very maternal role towards her two younger siblings after their father is wrongly imprisoned for selling state secrets.
Sibling Rivalry: A bit of minor impatience here and there is about as far as it goes. As we said before, she looks out for the other two like a mother hen.
The Sister: Georgia is a successful singer, with a grounded personal life. Little sister Sadie however, is failing as a singer, and has all manner of off-stage issues. Fortunately, despite the inherent jealousy bound into their situation, big sis is always on hand to look after her younger sibling…
Sibling Rivalry: Sadie might resent her big sister's success, but Georgia comes to her rescue in fine style when she sees Sadie bombing during a particularly bad night on stage. That in itself is quite aggravating for the younger girl, but there's no questioning her sister's intentions.
In America (2003)
The Sister: Naomi and Kirsten (played by real-life sisters Emma and Sarah Bolger) are just about the cutest pair of big-screen sisters you could hope to see, a charmingly precocious pair who more than hold their own alongside Paddy Considine and Samantha Morton.
Sibling Rivalry: They're remarkably well balanced, and indeed, cope with the death of their brother far more impressively than their parents do. Rather than indulging any rivalry, they're the cornerstone of the entire family unit.
The Other Boleyn Girl (2008)
The Sister: Call us shallow, but with their performances as Anne and Mary Boleyn, Scarlett Johansson and Natalie Portman have to be strong contenders for the most eye-wateringly gorgeous sisters in big-screen history. We couldn't leave them out.
Sibling Rivalry: They clash in a big way when Anne secretly marries nobleman Henry Percy, with Mary informing their father and uncle, who have the marriage annulled. She's only thinking of her sister's reputation, but even so...
You Can Count On Me (2000)
The Sister: Sammy is a struggling single mum, attempting to provide her children with some semblance of a normal family life, while Terry, her penniless drifter of a brother, sets about creating chaos around her. She does her best to be patient, but really, you can sympathise with her frustration!
Sibling Rivalry: Things really come to a head when Terry exchanges blows with Sammy's ex. Not your battle, old boy…
Ginger Snaps (2001)
The Sister: Ginger, who along with her sister Brigitte, is weirdly obsessed with death. That odd characteristic soon fades into insignificance, however, when she turns into a werewolf. That's much weirder.
Sibling Rivalry: Up until the transformation, the girls are like peas in a pod. And then afterwards, not so much...