* TheDanza: Eric Bana plays Erik.
* FakeAmerican: Australian CateBlanchett plays the Southern accented CIA operative Marissa. The double she uses to interogate Hanna (who keeps the accent) is played by British Michelle Dockery.
* FakeBrit: Averted. The only people in the main cast who actually play true to their nationality are the British family.
* FakeNationality: To complement the fake American, we have Australian Eric Bana and Irish SaoirseRonan playing Germans. English Tom Hollander also dons a somewhat vague nationality as Isaacs (possibly German).
* PlayingAgainstType: With no less than three different actors!
** SaoirseRonan has been known primarily for her roles in ''Film/{{Atonement}}'' and ''Film/TheLovelyBones''. Hanna's a bit more of an...active role.
** Creator/CateBlanchett, the Aussie rose to end all Aussie roses, is a SmugSnake of a CIA agent who isn't afraid to shed some blood.
** Tom Hollander, known for characters with a refined diginity such as the nice vicar from Series/{{Rev}}, or his idiot politician in InTheLoop, or his villainous role in the 2nd and 3rd PiratesOfTheCaribbean movies. Here he's a full-tilt leering DepravedBisexual assassin with a fondness for canary-yellow jumpsuits and relishes the suffering of his victims.
* SleeperHit: It didn't get much attention before its release and it's still a little obscure, but it was a commercial success and was well-received by critics and audiences alike.