Capote is a 2005 biographical drama film about American novelist Truman Capote directed by Bennett Miller, written by Dan Futterman and starring Philip Seymour Hoffman in the title role. The film primarily follows the events during the writing of Capote's 1965 nonfiction book In Cold Blood. The film was based on Gerald Clarke's 1988 biography Capote. It was released on September 30, 2005, coinciding with what would have been Capote's 81st birthday.

The film became a box office success and received acclaim from critics for Hoffman's lead performance. It won several awards, and was nominated for five Academy Awards including Best Picture, Best Director for Miller, Best Supporting Actress for Catherine Keener, and Best Adapted Screenplay, with Hoffman winning the Academy Award for Best Actor.

In 1959, the Clutter family murders take place on their Kansas farm. While reading The New York Times, Truman Capote is riveted by the story and calls The New Yorker magazine editor William Shawn to tell him that he plans to document the tragedy. Capote travels to Kansas, inviting childhood friend Nelle Harper Lee to come along. He intends to interview those involved with the Clutter family, with Lee as his go-between and facilitator. Alvin Dewey, the Kansas Bureau of Investigation's lead detective on the case, brushes him off. Still, Dewey's wife Marie is a fan of Capote's writing and persuades her husband to invite Capote and Lee to their house for dinner.

Capote's stories of movie sets and film stars captivate Marie. Over time, her husband warms to Capote and allows him to view the photographs of the victims. The Deweys, Lee, and Capote are having dinner when the murder suspects, Perry Smith and Richard "Dick" Hickock, are caught. Flattery, bribery, and a keen insight into the human condition facilitate Capote's visits to the prison where the accused are held. Capote begins to form an attachment to Smith. He informs Shawn of his intent to expand the story into a full-length book. Following the trial and conviction, after which both Smith and Hickock are sentenced to death, Capote gains continued access to the murderers by bribing Warden Marshall Krutch.

Capote spends the following years regularly visiting Smith and learning about his life, excepting a year-long stint when he goes to Morocco and Spain to write the "first three parts" of the book, accompanied by his romantic partner Jack Dunphy. The story of Smith's life, his remorseful manner, and his emotional sincerity impress Capote, who becomes emotionally attached to him despite the gruesome murders. Capote aids Smith and Hickock by obtaining expert legal counsel for them and initiating an appeal. Still, he is frustrated, as Smith declines to relate exactly what happened the night of the murders.

Though initially an effort to provide proper representation and extend Capote's opportunity to speak with the killers, the appeals process drags on for several years. Without the court case being resolved, Capote feels he is stuck with a story without an ending and is unable to complete his book. Eventually, he gets Smith to describe the killings and his thoughts at the time in great detail. He has what he wants from Smith, but he sees callousness and selfishness in his own actions in the process.

With everything now in hand, Capote still must wait for the appeals process to conclude before he feels he can publish his work. Lee's best-selling novel To Kill a Mockingbird is turned into a movie, but Capote is unable to share in the joy of his friend's success, too caught up in drinking through his misery. With the last appeal rejected, Smith pleads for Capote to return before he is executed, but Capote cannot bring himself to do so. A telegram from Smith to Harper Lee ultimately compels Capote to return to Kansas. There, he is an eyewitness as Smith and Hickock are executed. Capote talks to Lee about the horrifying experience and laments that he could not do anything to stop it. She replies, "Maybe not. The fact is you didn't want to". While returning home, Capote reviews the writings and drawings given to him by Smith, as well as an early childhood photo of Smith and his sister.

An epilogue notes that In Cold Blood made Capote the most famous writer in America; that Capote never finished another book, dying in 1984 from complications due to alcoholism; and that he chose a quote from Saint Teresa of Ávila – "More tears are shed over answered prayers than unanswered ones" – as the epigraph for his unfinished final novel.