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troperville

Mary Rodgers's Freaky Friday has been adapted to film three times (1976 and 2003 theatrical films, 1995 TV movie). The two main characters are switched after they coincidentally wish for the other to be in their shoes.
- This is true for the movies. In the original book, the teenage daughter wakes up in her mother's body, but doesn't know that her mother is in her (teenage) body, because she is faking it to teach her a lesson...
Like Father, Like Son has Dudley Moore (the father) and Kirk Cameron (the son) switching bodies through a Native American magic potion that requires eye contact for the bodies to switch souls.
Vice Versa is about an undersized preteen who swaps bodies with his workaholic father using a jewelled oriental skull. The boy has fun for a while but then the plot begins when he realizes he doesn't know how to change back....
1989's Dream a Little Dream exchanges the minds of a senior citizen (Jason Robards) and a teenager (Corey Feldman), which throws a little bit of both Overnight Age-Up and Fountain of Youth into the mix.
- Dream A Little Dream was a bit more complicated. The mind of Coleman (the old man) entered the body of Bobby (the teenager) and took over. Coleman's body was nowhere to be found. Bobby's mind was suppressed, but showed up to talk to Coleman in his dreams. Coleman's wife, Gena, also vanished. Her consciousness showed up inside Lainie, Bobby's would-be girlfriend, but Lainie's mind remained dominant.
At approximately the same time as Dream a Little Dream was released, three other body-swap movies with the same young/old theme hit theaters: Like Father, Like Son (1987), Eighteen Again (1988), and Vice Versa (1988). See Dueling Movies.
Face Off could be a twist on this trope; the mechanism is different, but it plays like a mind-switch. Especially considering (see more at Art Major Biology) the fact that Nicolas Cage and John Travolta have vastly different physiques....
In The Hot Chick, the main character who is an Alpha Bitch is bodyswapped with a (male) criminal. In this case, the bodies change into the other person's body, so the main character goes to sleep and wakes up in her own bed with a man's body.
The live-action Scooby Doo movie had a scene featuring a 4-way body swapping between Fred, Daphne, Velma, and Shaggy. The bodies rotated a few times before everyone got back to normal.
The Mexican movie Dame Tu Cuerpo ("Give Me Your Body", Double Entendre intended) is about the fianc�e and the best friend of a guy who switch bodies days before the wedding. Hilarity Ensues.
The Brazilian movie Se Eu Fosse Voc� ("If I Were You") has a husband and wife changing bodies. It goes back to normal after the couple has sex. It warranted a sequel, when both are about to split up, their daughter is pregnant and thus needs to get married... and to make things worse, sex doesn't fix things, only gets the "husband" pregnant.
Prelude To A Kiss has Alec Baldwin as a new husband who is somewhat disconcerted when his new wife's psyche and that of an old man are switched when he kisses her on their wedding day.
It's a Boy Girl Thing swapped the high-school jock and the unpopular geek girl.
The 1940 comedy Turnabout (later adapted as a short-lived TV sitcom) has a married couple inhabiting each other's bodies due to a spell from an enchanted statue. In the film (not the TV version), the voices go with the selves, so that the husband's body speaks with the wife's voice and the wife's with the husband's — as in more-recent animated cartoons.
The Australian comedy Dating The Enemy has a fighting couple (played by Guy Pearce and Claudia Karvan) switch and experience life in the opposite gender's body, bettering each other's life in the process before getting their bodies (and their love for each other) back.
1996 Disney Channel television-movie Wish Upon A Star (starring Katherine Heigl and Danielle Harris) concerns two very different sisters who unintentionally switch bodies while wishing upon a shooting star. They learn to love each other, do some math tutoring, go to the Big Dance, and get their bodies back.
The 1999 made for TV Wonderful World of Disney movie (boy, Disney sure likes to use this gimmick a lot) A Saintly Switch finds David Alan Grier and Vivica A. Fox switching bodies.
The Change Up - family man switches bodies with bachelor.
Detention has a temporal version of this. Sloan Fisher wakes up in her teenage daughter Ione's body in the present day of 2011, while Ione wakes up in Sloan's body... in 1992, back when Sloan was in high school. This plays havoc on the film's Timey Wimey Ball, and is one of the factors that almost leads to the end of the world.