It's not you, it's your sister.

Stuck on You (2003)
In Martha's Vineyard, Mass., conjoined twins Walt and Bob Tenor make the best of their handicap by being the fastest grill cooks in town. While outgoing Walt hopes to one day become a famous actor, shy Bob prefers to stay out of the spotlight. When a fading Hollywood actress, Cher, decides to get her show "Honey and the Beaze" cancelled, she hires Walt -- and his brotherly appendage -- as her costars. But their addition surprisingly achieves the opposite.

Trading Places (1983)
A snobbish investor and a wily street con-artist find their positions reversed as part of a bet by two callous millionaires.

Bill & Ted's Bogus Journey (1991)
Amiable slackers Bill and Ted are once again roped into a fantastical adventure when De Nomolos, a villain from the future, sends evil robot duplicates of the two lads to terminate and replace them. The robot doubles actually succeed in killing Bill and Ted, but the two are determined to escape the afterlife, challenging the Grim Reaper to a series of games in order to return to the land of the living.

Southland Tales (2007)
Set in the futuristic landscape of Los Angeles on July 4, 2008, as it stands on the brink of social, economic and environmental disaster. Boxer Santaros is an action star who's stricken with amnesia. His life intertwines with Krysta Now, an adult film star developing her own reality television project, and Ronald Taverner, a Hermosa Beach police officer who holds the key to a vast conspiracy.

That's Not Me (2017)
Polly’s dreams of making it as an actor are shattered when her identical twin sister Amy lands the lead role in a huge TV show. Mistaken for her famous sister at every turn, Polly decides to use Amy’s celebrity for her own advantage – free clothes, free booze, casual sex… with hilarious and disastrous consequences for them both.

Two Heads Creek (2019)
A timid butcher and his drama queen twin sister quit the hostile confines of post-Brexit Britain and venture to Australia in search of their birth mother, but the seemingly tolerant townsfolk are hiding a dark, meaty secret.

Six Days Seven Nights (1998)
In the South Pacific island of Makatea, career-driven magazine editor Robin Monroe is on a week-long vacation getaway with her boyfriend, Frank Martin. An emergency work assignment in neighboring Tahiti requires Robin to hire the cantankerous pilot Quinn Harris who had flown them to Makatea on a small transport plane. While flying, a powerful storm forces Quinn to make an emergency landing on a nearby deserted island. The dissimilar pair avoid each other at first, until they're forced to team up to escape from the island -- and some pirates who want their heads.

Conversation with the Beast (1997)
An American historian (Mr Webster) comes to Berlin to visit an old man who claims to be the real Adolf Hitler and to be 103 years old. The Hitler who died in 1945, the old man says, was just one of his six doubles - one for each weekday - while Hitler himself retired into a bunker below the S-Bahn tracks and married a second time.

The Young Girls of Rochefort (1967)
Delphine and Solange are two sisters living in Rochefort. Delphine is a dancing teacher and Solange composes and teaches the piano. Maxence is a poet and a painter. He is doing his military service. Simon owns a music shop, he left Paris one month ago to come back where he fell in love 10 years ago. They are looking for love, looking for each other, without being aware that their ideal partner is very close...

Adaptation. (2002)
Charlie Kaufman is a confused L.A. screenwriter overwhelmed by feelings of inadequacy, sexual frustration, self-loathing, and by the screenwriting ambitions of his freeloading twin brother Donald. While struggling to adapt "The Orchid Thief," by Susan Orlean, Kaufman's life spins from pathetic to bizarre. The lives of Kaufman, Orlean's book, become strangely intertwined as each one's search for passion collides with the others'.

Bad Company (2002)
When a Harvard-educated CIA agent is killed during an operation, the secret agency recruits his twin brother.

The Other One's Mug (1979)
Martial Perrin is the president of a right-wing political party which is gearing itself up for a forthcoming election. When he learns that a notorious criminal named Kraus has escaped from prison, Perrin panics and goes into hiding. His deputy, Constant, hires Perrin’s cousin, Gilbert, an actor who is a perfect double of Perrin, to replace him. What Gilbert does no know is that the killer Kraus is bumping off the people who were implicated in the affair for which he was arrested, and that Perrin is next on his list.

Life Is a Long Quiet River (1988)
Two babies are switched at birth. When the mistake is discovered 12 years later, it leads to complications in the lives of both families. One family is affluent, with dutiful and (apparently) contented children. The other family is poor, with rambunctious (even delinquent) children, often hungry, but with lots of laughter in the house.

Ryan's World the Movie: Titan Universe Adventure (2024)
Ryan jumps into a mystical superhero comic book to save his younger sisters, Emma and Kate.

Sister Act (1992)
A Reno singer witnesses a mob murder and the cops stash her in a nunnery to protect her from the mob's hitmen. The mother superior does not trust her, and takes steps to limit her influence on the other nuns. Eventually the singer rescues the failing choir and begins helping with community projects, which gets her an interview on TV—and identification by the mob.

City Slickers (1991)
Three New York businessmen decide to take a "Wild West" vacation that turns out not to be the relaxing vacation they had envisioned.

Miss Congeniality (2000)
When the local FBI office receives a letter from a terrorist known only as 'The Citizen', it's quickly determined that he's planning his next act at the Miss America beauty pageant. Because tough-as-nails Gracie Hart is the only female Agent at the office, she's chosen to go undercover as the contestant from New Jersey.

Army of Darkness (1992)
Ash, a handsome, shotgun-toting, chainsaw-armed department store clerk, is time warped backwards into England's Dark Ages, where he romances a beauty and faces legions of the undead.

The Cuckoo (2002)
September of 1944, a few days before Finland went out of the Second World War. A chained to a rock Finnish sniper-kamikadze Veikko managed to set himself free. Ivan, a captain of the Soviet Army, arrested by the Front Secret Police 'Smersh', has a narrow escape. They are soldiers of the two enemy armies. A Lapp woman Anni gives a shelter to both of them at her farm. For Anni they are not enemies, but just men.

Back to the Future (1985)
Eighties teenager Marty McFly is accidentally sent back in time to 1955, inadvertently disrupting his parents' first meeting and attracting his mother's romantic interest. Marty must repair the damage to history by rekindling his parents' romance and - with the help of his eccentric inventor friend Doc Brown - return to 1985.