Will Ferrell has shared that his late 'Elf' co-star James Caan initially did not find him funny and was genuinely annoyed by his performance during the filming of the 2003 Christmas movie. Caan frequently teased Ferrell, saying he was 'way too over the top' and failed to understand his comedic style. However, after seeing the final cut at the movie's premiere, Caan praised Ferrell's performance, calling it 'brilliant.' Ferrell reflected fondly on their time together, noting that Caan's annoyance was real but ultimately turned into admiration for the finished product.