| Obscure Trivia | Best Actor Nominee | Nominated Film and Year |
| His nominated film has been referred to by many critics as the “African Schindler’s List.” | |
| According to his interviews after making the nominated film, he stayed in his dictatorial Oscar-winning role even when filming wrapped for the day. | |
| The only Best Actor nominee of the 2000s, and maybe ever, to be nominated for a largely performance capture role. | |
| The reason for his loss in the Best Actor category, according to Robert Downey Jr.’s character in Tropic Thunder, was because “he went full-retard.” | |
| His voice was higher than the real life figure he was playing so the film’s band learned to play all the songs in a higher key until he trained to lower his voice. | |
| The only Best Actor nominee in the 2000s to be nominated for a film based on a Broadway musical. | |
| He is the only Best Actor winner and nominee in the 2000s to also be nominated in the Best Supporting Actor category in the same year. | |
| He spent a year losing weight and growing out his hair to play his nominated role, enough time for his director to make a whole other film, What Lies Beneath. | |
| He holds the distinction of being one of two actors nominated in every decade from the 60s to the 2000s (he's the American one.) | |
| He is the only Best Actor nominee from the 2000s to be nominated for a role in which not a single word of English is spoken. | |
| He is the second Best Actor nominee ever to play the former U.S. president who served from 1969-1974. | |
| He initially refused to say his Oscar-winning performance's famous line 'In this life or the next, I will have my vengeance' because he thought it sounded like garbage. | |
| In his nominated film, he played an Iranian immigrant even though he himself is actually a mix of British and Indian descent. | |
| He is the only Best Actor nominee in the 2000s to be nominated in acting, directing and producing for the same film, winning for only two of three (but I won’t say which.) | |
| He directed himself to a nomination in a project that was a long-term dream of his after his father gave him a copy of the title character's biography more than 10 years prior. | |
| The first scene of the film, where this nominee sits with his character’s girlfriend, took 99 takes to finish. | |
| The director of his nominated film originally planned to cast John Belushi and later Willem Dafoe as his character before eventually casting him when the film was finally made. | |
| He is the only Best Actor nominee of the 2000s to be nominated for a film that has had a stage musical developed after it. | |
| His nominated character’s name is coincidentally shared with the name of one of the winners of that year's Best Original Song award. | |
| Only Best Actor nominee of the 2000s, and maybe ever, to be directed to an Oscar nomination by a fashion designer. | |
| To prepare for his nominated role, he interviewed nearly 200 pimps and prostitutes and even lived with 4 different pimps for month-long periods. | |
| Only Best Actor nominee of the 2000s to be nominated for a black-and-white film (which was actually shot in color on a grey-scale set.) | |
| Before making his nominated film, he sold his apartment and his car and did not watch TV in order to connect with the feeling of loss required to play his Oscar-winning role. | |
| His co-star in his nominated film, Robert Duvall, also won Best Actor for Tender Mercies, playing a very similar role. | |
| Three previous Best Director Oscar winners served as either producers or executive producers on his nominated film: Anthony Minghella, Sydney Pollack and Steven Soderbergh. | |
| His nominated character previously won another actor a Best Actor award in 1969, although this nominee did not share the same luck. | |
| Although he has appeared in four Martin Scorsese films in the 2000s, three of which were nominated for Best Picture, he was only nominated for one of them. | |
| The only two-time Best Actor winner to win both his awards within the 2000s. | |