Our title pages display cast lists in the same order as they appeared in the most complete onscreen listing found in the movie or show (usually the end credits).
This may be different than the billing order you see on movie posters. Sometimes, cast members are credited in order of appearance, while in others they are listed in alphabetical order. That's why sometimes movie stars or important characters may appear towards the bottom of the listing instead of the top.
If you're looking only at the 'Main Details' page for a film, which by default displays just the first 15 cast members, you might miss them. To find the entire list, click the "See full cast" to display everyone. You should be able to find them further down the page.