Mirroring what the sibling comment said, studios often spend almost as much on advertising as they do production. I've often heard studios "borrowing" advertis

Mirroring what the sibling comment said, studios often spend almost as much on advertising as they do production. I've often heard studios "borrowing" advertising budget to pay named actors for production. Disney's old plan was to hire past their prime actors. Starting around the 90s when Robin Williams did well for Aladdin, they started courting celebrities who are parents and want to make movies their kids can watch. Also, voice work is considered "easy" (voice actors will fight that connotation). No odd call times, make up, wardrobe, or flying to locations and staying in a hotel (Shrek had Mike Myers record some last-minute dialog inside a limo).