Bowfinger(1999)

On the verge of bankruptcy and desperate for his big break, aspiring filmmaker Bobby Bowfinger concocts a crazy plan to make his ultimate dream movie. Rallying a ragtag team that includes a starry-eyed ingenue, a has-been diva and a film studio gofer, he sets out to shoot a blockbuster featuring the biggest star in Hollywood, Kit Ramsey -- only without letting Ramsey know he's in the picture.