For a while now - I've been racking my brain with listing out actors (boy and girl types) that have played the same character in two sets of trilogies. Here is what I can remember - just add anything new to the list.
Sir Ian McKellen - Xmen/Lord of the Rings
Mel Gibson - Mad Max/Lethal Weapon
Orlando Bloom - Pirates/Lord of the Rings
Harrison Ford - Indiana Jones/Star Wars
Clint Eastwood - Dirty Harry/Spaghetti Westerns
Hugo Weaving - Matrix/Lord of the Rings
Sly Stallone - Rocky/Rambo
Christopher Lee - Lord of the Rings/Fu Manchu
Eddie Murphy - Beverly Hills Cop/Shrek
Michael Myers - Shrek/Austin Powers
Michael J. Fox - Stuart Little/Back to the Future
Matt Damon - Bourne Series/Ocean Series
Warwick Davis - Star Wars and Ewoks/Harry Potter/Leprechaun
Any others?
From Mancuso: Talia Shire - Rocky/The Godfather
From Dallas: Frank Oz - The Muppet Movies/Star Wars - Episodes I - III