Posts connection

Searching for a plugin or some idea, how to make my dream true.
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I have two sections, “movies” and “actors“.

Want to make a connecton between posts, published in these categories.

As example – when we add a new post for “movies”, we need to link this post with some posts in category “actors”. Like this:
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Post name: Tropic Thunder
Category: Movies

Actors:
Name – Ben Stiller
Role – Tugg Speedman

Name – Robert Downey Jr.
Role – Kirk Lazarus

Name – Jack Black
Role – Jeff Portnoy
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So:
1) if there is a post in category “actors” with title “Ben Stiller”, it should be a link to that post.
2) if there is no such post in “actors”, don’t make a link, just show as text “Ben Stiller”
3) must have a way to show all actors, attach to post on a post page.

thats all. Any idea, how to realize this?