Ben Stiller Spills a Major 'Zoolander 2' Secret

— -- "Zoolander 2" is currently filming in Europe -- and one of the stars revealed a major plot point.

Ben Stiller revealed on Instagram that his character, Derek Zoolander, will have a son in the movie.

"Meet @cyrusarnold. Son of Derek. #Zoolander2," he wrote.

Added Arnold: "It's out!!! I am playing Ben Stiller's son in "Zoolander 2"!! So happy to share the news with all of you!! #zoolander2 #derekjr"

Last month, Stiller and Owen Wilson channeled their on-screen model personas in the Valentino show during Paris Fashion Week before heading to Italy to shoot the film.