In case you haven't heard, "The Change-Up" follows two friends -- played by Ryan Reynolds and Jason Bateman -- who accidentally swap bodies. Like the many body-swap comedies that came before it, hilarity ensues.
But what if this could happen in real life? Even if it were just for 24 hours, who's shoes would you want to fill?
We asked 23 celebrities -- from Emma Roberts and Jesse Eisenberg to John C. Reilly and Hilary Duff -- who they would want to be for a brief moment. Their responses were, well, rather interesting. One person even wanted to try being Charlie Sheen for a day!
Click through our gallery and see for yourself.