A 1984 comedy-fantasy film starring Creator/SteveMartin and Creator/LilyTomlin, directed by Carl Reiner. This was the last of four movies Martin and Reiner made together (the others were, in order, ''Film/TheJerk'', ''Film/DeadMenDontWearPlaid'' and ''Film/TheManWithTwoBrains'').

The plot concerns dying millionairess Edwina Cutwater (Tomlin) who, having never had a real life, makes a deal with her stablemaid Terry (Victoria Tennant) to help the younger woman AscendToAHigherPlaneOfExistence, allowing Edwina to take over her body with the help of an eccentric Tibetan mystic (Richard Libertini). However, the procedure is screwed up, causing Edwina's soul to instead be passed into Roger Cobb (Martin), her recently-fired lawyer. HilarityEnsues as Roger, whose feelings towards his ex-client are less than warm, attempts to transfer Edwina's soul to the right body while coping with her having complete control over the left side of his, all the while trying to convince his boss, fiancee and everyone else around him that everything is perfectly normal.
!!This film provides examples of:

* AscendToAHigherPlaneOfExistence: Terry claims to want to do this. [[spoiler: Actually, she's just a cynical GoldDigger exploiting what she thinks is Edwina's insanity to inherit her millions. Turns out that Edwina wasn't so loopy, though, to her horror.]]
* BeYourself: Roger actually hates being a lawyer, and would be much happier devoting himself to jazz music, but feels that he has to focus on his law career as a more stable option. The events of the movie [[spoiler: not to mention the fact that he gets fired]] convince him to focus on his music career instead.
* BlackBestFriend: Roger's jazz musician pal Tyrone is this as well as a BlindBlackGuy.
* BunnyEarsLawyer: Roger brings his dog to work. Played with; this is probably because deep down he actually doesn't ''want'' to be a lawyer.
* CharacterDevelopment: Roger finally decides what he really wants to do with his life, and Edwina becomes a lot nicer over the course of the movie.
* DeadpanSnarker: Edwina, while in Roger's body.
-->'''Burton:''' ''(on having affairs with widows)'' I should get a dinner, not court.
-->'''Edwina:''' He should get a social disease.
* {{Determinator}}: "Cutwaters aren't quitters."
* DifferentForGirls: Edwina's attempts to act masculine after Roger gets knocked out and she finds herself in control of the entire body show that she has no understanding of male behavior.
* [[spoiler: FemmeFatale: Terry.]]
* FreudianExcuse: Edwina's bitchiness can be explained by the fact that she's spent her life in a sick bed, combined with the fact that she's consequently been ignored, lonely and friendless her whole life as a result. To the extent that even a clown hired to entertain her for her birthday couldn't be bothered.
--> '''Roger''': [[ComicallyMissingThePoint That's a terrible clown!]]
* FunnyForeigner: Prahka Lasa, the Tibetan mystic who conducts the soul transference.
* [[spoiler: GoldDigger: Terry]]
* GrandTheftMe: Edwina's occupation of Roger's body can be seen as a lighter, comedic version of this.
* HeadTiltinglyKinky: Terry, when Edwina!Roger starts scolding her.
* IllGirl: Edwina has been sick her whole life.
* TheImmodestOrgasm: Peggy demonstrates a fake one to Roger after breaking up with him.
-->'''Roger:''' [[CrowningMomentOfFunny Yeah, well I faked mine too!]]
* InnocentBystander: Roger wasn't even in the room when the soul transfer was taking place, but found himself involved owing to the misfortune of happening to be under the window that the soul jar transmitting Edwina's soul was falling out of.
* TheMirrorShowsYourTrueSelf: Or the self who happens to be co-occupying your body at that particular point in time, as the case may be.
* RichBitch: Edwina. She mellows over the course of the movie, however.
* ScrewTheRulesIHaveMoney:
-->'''Ediwna:''' Guess what I'm going to do? I'm going to come back from the dead.\\
'''Roger:''' Aaahhh. And what makes you think you can do that?\\
'''Edwina:''' Because I'm rich.
* ShooOutTheClowns: Of a sort; while it's still a comedy, it's more naturalistic (in as much as a comedy about a woman's soul entering a man's body and taking over the left side of his body can be said to be 'naturalistic', that is) and plot-based than the earlier Steve Martin-Carl Reiner collaborations, which were more zany, surreal and madcap. In particular, Martin's character is quite different from his characters in the earlier ones, being a fairly smart, down-to-earth and everyday guy (albeit one who is not without some quirks) who just happens to get stuck in an unusual situation rather than the over-the-top clownish buffoons typically played in the earlier movies.
* {{Slapstick}}: Although not so much slapstick violence occurs, a lot of humour is generated from Martin's physical performance of a man occupied by two souls, one belonging to a man and the other a woman who have control over the right and left sides of his body respectively, and the less than pleasant results this has for him.
* SoulJar: A bowl that can hold a soul, but only until someone touches it. It also stops working if it gets slightly dented.
* ThirdLawOfGenderBending: When Tomlin's character has to "pilot" Martin's body solo in a courtroom scene.
* UnwantedAssistance: An in-universe example. At one point, Roger provides a lengthy summation of the various attempts Edwina has made while co-occupying his body to help him, along with the various catastrophic consequences this has had for him, summed up with the trope name. Edwina, however, points out that while her actions might not have had the intended consequences, she's actually ended up helping him do [[BeYourself what he really wants with his life]]:
-->'''Roger''': Since you started helping me, in the last twenty-four hours, I've lost my girl, my job, I've alienated my dog! [[ArsonMurderAndJaywalking I broke my sunglasses]]! You can't even get that kind anymore. Stop helping me!!
-->'''Edwina''': You know, you are so ungrateful. If it wasn't for me, you would get that partnership, and then you'd have to take cases like that, and kiss your father's high ideals goodbye. You'd also be married to Peggy; you call that savoring life?
-->'''Roger''': Oh, look who's talking!
-->'''Edwina''': [[FreudianExcuse I spent my life in a sick bed]]. What's your excuse?
-->''[Roger is lost for a reply]''
-->'''Roger''': ''[Fuming]'' It's just like a dead person to say that.