Did someone say Matthew McConaughey?
He was in A Time to Kill with Samuel L. Jackson. The rest is stated in the preceding post (Samuel L. Jackson was in Pulp Fiction which is #8)
Since that was so easy, let's take a different path. Matthew McConaughey was in Amistad which was directed by Steven Spielberg who also directed Indiana Jones and the Last Crusade which was partly written by George Lucas who also wrote and directed Star Wars (#10).
No one said it had to be American actors, so for a little challenge (and, actually, it's pretty easy if you know how to start)....
Eduardo Noriega