The phone conversation at midnight between Frost and Nixon never actually happened. Screenwriter Peter Morgan got the inspiration from well-known phone calls at midnight, that Nixon did to some government members during the Watergate scandal.
Frank Langella admits that he usually enjoys playing cards, and joking around on movie sets, but felt it would compromise his character if he didn't remain Presidential on this set. While working on this movie, other cast and crew referred to him as "Mr. President." Langella suggests almost none of the crew ever met Frank Langella.
The Broadway production of "Frost/Nixon" by Peter Morgan opened at the Bernard B. Jacobs Theater in New York City on April 22, 2007, ran for 137 performances and was nominated for the 2007 Tony Award for Best Play.
In an article called 'Stopping the Rot' in The Sydney Morning Herald (Australia) on May 3, 2008, Ian Munro quoted James Reston, Jr., Frost's Watergate adviser: 'I was in army intelligence ... and the Mutt and Jeff, good cop-bad cop thing is usually two people, but Frost, he did both roles.'
Oliver Platt previously played Yankees Owner George Steinbrenner in the ESPN mini-series The Bronx Is Burning (2007). In 1974, Steinbrenner was convicted and suspended from baseball, due to illegal contributions made to Nixon's 1972 Re-Election Campaign.
The pivotal scene where a drunken Nixon telephones Frost in the middle of the night (something that never took place in real-life) was filmed in two adjacent sets with both actors on stage at the same time in order to bring a real sense of spontaneity to such a key scene.
Frank Langella stayed in character throughout the entire production. This naturally isolated him from most of the cast and crew who were overly deferential to him, something that the actor was pleased about, as it was an essential component of his character. On the last day of the last shot, Langella dropped the façade and shouted to everybody "Hello, everyone, I'm Frank!"
To signify that the David Frost character never stopped working, Michael Sheen was dressed perpetually in suits. The one exception is at the start of the film before Frost latched onto the Nixon interview idea when he is seen topless in bed.
The piano piece you can hear in the movie is the "Richard Nixon Piano Concerto #1", written by the President himself, and is played by Frank Langella, who plays Nixon. A video footage of the actual Nixon, playing it on a television show, can be found on the net.
Sir Anthony Hopkins for Nixon (1995) and Frank Langella for Frost/Nixon (2008) were Oscar nominated for the Best Performance by an Actor in a Leading Role Academy Award, both for portraying former President Richard Nixon. Both actors failed to win the Best Actor Oscar for playing Nixon. Of the total four Oscar nominations garnered by Nixon (1995) and the five Oscar nominations garnered by Frost/Nixon (2008), both pictures were both only mutually Oscar nominated in one of the same categories which was for Best Actor. However, both were Oscar nominated for their scripts, Nixon (1995) for Best Original Screenplay and Frost/Nixon (2008) for Best Adapted Screenplay.