Two girls (both played by Mills) at a summer camp discover that they are long-lost twins separated shortlyafter birth. They launch a determined battle to reunitetheir estranged parents.

Two estranged twin sisters are brought together on a reality television program and work together to thwart plots against them.

Mary-Kate and Ashley jet to London to represent their high school at an international competition of the Model United Nations, and have the time of their lives as they enjoy the thrill of competition and take in the sights of London by day and by night. Mary-Kate and Ashley are out on the town visiting the landmarks, wearing the hippest fashions, hanging out with the cutest guys and dancing at the hottest clubs.

Antoine and Quentin are 18-year-old twins who live with their father in France. When their estranged mother dies in Spain, they set off to attend the funeral, without telling their father. The journey turns out to be more difficult than either had anticipated and a rift threatens to split the brothers apart. The brothers must struggle to accept each other as individuals, and to find their places in an uncertain world.

Twelve-year-old twins Dipper and Mabel Pines spend the summer in mysterious Gravity Falls with their great uncle Stan, who runs a tacky tourist trap.

Reporter Grace Collier witnesses a woman committing a bizarre murder. When police fail to find a corpse or any trace of the crime, Collier undertakes her own investigation that leads her to a mental asylum and the discovery of the mysterious woman's once-conjoined twin.

After twin sisters witness a crime, they're placed in the Witness Protection Program with their family, and end up living in Australia.

Laurel has always been the odd wallflower, choosing to live at home with her father, while her glamorous identical twin, Audrey, possesses the confidence and appeal to succeed in the big city. When tragedy strikes and Laurel is mistaken for her twin sister, she makes the impulsive decision to assume her sister's identity and become The Pretty One. As she eases into her new, independent existence, Laurel discovers that she's capable of accomplishments...

Two eighteen-year-old fraternal twins born into a wealthy and privileged world discover that they have no boundaries between them.

Billy and Jimmy Lee are twins separated at birth and raised by opposing factions. Billy joins forces with police officer Marian Martin and together they fight to protect The City from the Shadow Warriors, a criminal organization led by mysterious Shadow Master, who secretly instructs Jimmy Lee in the dark ways of the Black Flame. Can long-lost brothers reunite to become the legendary Double Dragon?