Bruce Willis has been one of Hollywood's most beloved actors for decades, and it appears his charm isn't reserved for on screen or public appearances.MORE: Bruce Willis and Emma Heming turn heads with 'sizzling' throwback photoshootThe star announced his retirement earlier this year, citing a recent aphasia diagnosis as the reason for stepping back from Hollywood and acting.However, he still has some projects that haven't been released or wrapped up production just yet, and as fans and celebrities alike look back on his storied career, one co-star who worked in one of his very last projects is opening up about what the experience was really like.WATCH: Bruce's wife Emma Heming Willis revealed how she copes with her 'paralyzing grief' amid her husband's aphasia diagnosisMORE: Bruce Willis dances with daughter Mabel in adorable new videoSpeaking with People Magazine, Bruce's Wire Room co-star Oliver Trevena had nothing but praise for him.Admitting that it was always a dream of his to work alongside him, he said: "He's an icon in the action world, in the movie world.