Early in his career, Postlethwaite was advised to adopt a new surname for his acting work by his first agent and by peers who quipped that his name "would never be put up in
lights outside theatres because they couldn't afford the electricity". He rejected the advice. He started his career at the
Everyman Theatre in
Liverpool, where his colleagues included
Bill Nighy,
Jonathan Pryce,
Antony Sher,
Matthew Kelly, and
Julie Walters, having an intimate relationship with the latter during the mid-to-late 1970s. This was directed by Rupert Goold, who would also direct his
Lear in 2008, in which Postlethwaite played every character. As well as Australia, the play toured Canada, New Zealand and the UK to great acclaim. In
The Art of Discworld (2004),
Terry Pratchett wrote that he had always imagined
Sam Vimes as "a younger, slightly bulkier version of Pete Postlethwaite".
Steven Spielberg, who directed Postlethwaite in 1997's
The Lost World: Jurassic Park, called him "the best actor in the world". Postlethwaite quipped: "I'm sure what Spielberg actually said was, 'The thing about Pete is that he thinks he's the best actor in the world. Postlethwaite next starred in a Liverpool stage production of
King Lear in 2008 at the Everyman Theatre, Liverpool, and at the Young Vic, London. He appeared in the
climate change-themed film
The Age of Stupid, which premiered in March 2009. One of his more notable roles was
Sergeant Obadiah Hakeswill in ITV's
Sharpe series. The actor said this was one of his favourite roles and that he and fellow actor
Sean Bean played well off each other because of their mutual love and respect.
Bernard Cornwell, the author and creator of the
Sharpe series, specifically wrote Hakeswill's character in later novels to reflect Postlethwaite's performance as the character in the TV series. Postlethwaite co-starred with Bean in
When Saturday Comes. Terminally ill, Postlethwaite made a return to Hollywood in three 2010 films, first as Spyros in
Clash of the Titans. He next appeared in the blockbuster hit
Inception as Maurice Fischer, an industrialist who is slowly dying. Lastly, his performance in
The Town as florist and crime boss Fergus "Fergie" Colm was well received by critics, which would earn him a posthumous nomination for
BAFTA Award for Best Actor in a Supporting Role, and making several publications' lists of Oscar predictions for Best Supporting Actor. His final appearance on screen was in
Nick Hamm's film
Killing Bono, based on the memoir of Neil McCormick. The role was written specially for Postlethwaite to accommodate his illness. The film was released on 1 April 2011. He was scheduled to be in the BBC series
Exile, but had to pull out due to his declining health and was replaced by
Jim Broadbent. ==Activism==