I have been a big fan of Anne Hathaway since I saw her in "The Devil Wears Prada."
In "Get Smart" movie, Carell and Hathaway are both agents (Maxwell Smart and Agent 99) for a fictitious intelligence agency. The two go on a mission together to Russia to find out how KAOS, a terrorist organization, was getting nuclear weapons. There is a lot of action-filled comedy and eventually Smart is suspected to be a double-agent. He proves that he is not a double agent by preventing the explosion of a bomb at a concert in Los Angeles attended by the president.
If you are looking for spy-thriller, this is not the movie for you, but if you like satire and comedy, it is a good one. I was also pleasantly surprised that there is a lot more action in the movie than I would have expected from demure Hathaway and least likely spy Carell.