Which film is based on a TV show ("The Thick of IT") about a fictional British governmental department?

"In the Loop", a 2009 British satirical black comedy film directed by Armando Iannucci, is a film that is a spin-off from the BBC TV series "The Thick of It". It satirizes Anglo-American politics, in particular the invasion of Iraq. It was nominated for the 2009 Academy Award for Best Adapted Screenplay. The film stars Peter Capaldi, Tom Hollander, Gina McKee, Chris Addison, David Rasche, and James Gandolfini.

It was produced by Kevin Loader and Adam Tandy. Cinematography is Jamie Cairney, major editing Billy Sneddon and Ant Boys, and music by Adem Ilhan. Production was conducted by BBC Films, the UK Film Council, and Aramid Entertainment. Optimum Releasing handled film distribution, starting in April 2009 in the UK.

This is a film that immediately received great critical acclaim, while also being a big commercial success at the box office. It grossed $7.79 million US dollars, based on a budget of $829,006 US dollars.