That is the case in Men in Black III, with the exception of our own "Conchord", Jemaine Clement, who plays the decidedly nasty Boris the Animal.
Boris is the archvillain who Agents K (Tommy Lee Jones) and J (Will Smith) have to defeat to keep the world safe.
Boris has escaped from the highest-security jail on the moon, and returns to Earth with one mission - exacting his revenge on Agent K for shooting off his arm.
To achieve his aim, Boris must go back in time to 1969, when Agent K injured and captured him while trying to protect the Earth. Agent J knows he must also go back in time to prevent Boris achieving his aim - the future of the planet depends on it.
Back in 1969, Agent J must convince a young K (now played by Josh Brolin) that they must stop Boris from changing the course of history.
While trying to track down Boris, the agents cross paths with an interesting ensemble of creatures with evil intentions.
Men in Black III is good fun. There is a plausible storyline, some fascinating characters, wonderful humour and special effects that leave you gasping at their authenticity and violence.