Zoolander
Ben Stiller is such a multitasker that he managed to star in and direct the 2001 comedy “Zoolander.” He played a fashion celebrity stuck in the middle of an assassination plot. Interestingly, one scene he shared with David Duchovny was utterly improvised.
Duchovny’s J.P. Prewett explained to Zoolander the reason male stars were used for the scheme, but Stiller’s character ended up repeating the same question: “But why male models?” Duchovny went on with it and rolled with this direction, replying with his own ad-libbed dialogue. Both guys didn’t break their fourth walls even though this scene was incredibly hilarious!