Which actors have been involved in two or more movie franchises (movies with sequels)? It will be surprising because some huge actors don't have so many as lesser-known ones.

6 Christopher Lee: The Wicker Man, Star Wars, Lord of the Rings, Three Musketeers, Dracula, Fu Manchu
5 Eddie Murphy: Shrek, Doctor Dolittle, The Nutty Professor, Beverly Hills Cop, 48 Hours
4 Harrison Ford: Indiana Jones, Star Wars, Jack Ryan movies, American Graffiti
3 Samuel L. Jackson: Marvel superhero movies, Star Wars, XXX
3 Owen Wilson: Night at the Museum, Meet the Parents, Shanghai Noon
3 Ben Stiller: Night at the Museum, Meet the Parents, Madagascar
3 Mike Myers: Shrek, Austin Powers, Wayne's World
3 Vin Diesel: Fast and the Furious, XXX, Riddick
3 Steve Martin: Pink Panther, Father of the Bride, Cheaper by the Dozen
3 Robert De Niro: Meet the Parents, Analyze This, Godfather
3 John Rhys-Davies: Indiana Jones, Lord of the Rings, Anaconda
2 Bruce Willis: Die Hard, Whole Nine Yards
2 Arnold Schwarzenegger: Terminator, Conan
2 Sylvester Stallone: Rambo, Rocky
2 Clint Eastwood: Dirty Harry, Any Which Way
2 Tommy Lee Jones: Men In Black, The Fugitive
2 Sean Connery: Highlander, James Bond
2 Mel Gibson: Lethal Weapon, Mad Max
2 Jason Statham: Transporter, Crank


Any others??

You left off "Indiana Jones" for Sean Connery and the Navarone films for Harrison Ford

3 Chevy Chase: Vacation Films, Caddyshack, Fletch
2 Billy Crystal: Analyze This, City Slickers

Tim Allen: Toy Story, Santa Clause...and I just noticed Wild Hogs 2 is in pre-production.

only if you count Sean Connery's photograph in Crystal Skulls.

"The Wicker Man" was a franchise? I don't think remakes count.

Wild Hogs 2 is dead, but your post made me think of this one;

2 John Travolta: Saturday Night Fever/Staying Alive, Look Who's Talking 1-3

They're in pre-production for Wicker Man 2: Pagan Boogaloo

3 John Rhys-Davies: Anaconda 2-3, Indy 1 & 3, LOTR 1-3

2 Bruce Campbell: Spider-Man 1-3, Evil Dead Series

I've never been so glad to have someone correct me.

2 Joe Pesci: Lethal Weapon 2-4, Home Alone 1-2

2 Patrick Stewart: Star Trek 7-10, X-Men 1-3

Will Smith: MIB, Bad Boys
Martin Lawrence: Bad Boys, Big Momma's House, House Party
Anne Hathaway: Get Smart (part 2 in development), Princess Diaries
John Travolta: Look who's talking, Taking of Pelham 1, 2 & 3

Seriously, though, he would have made the cut had Wild Hogs 2 gone forward.

Jackie Chan-Drunken Master,Police Story,Rush Hour,Shanghai Noon/Knights
Sonny Chiba-Streetfighter,Mas Oyama series (Bearfighter/Bullfighter)
Jet Li-Once/China,Fong Sai Yuk (The Legend)
Jimmy Wang Yu-One Armed Swordsman,One Armed Boxer

How can the OP leave the Dollars trilogy out of Eastwood's list?

Orlando Bloom - Rings, Pirates
Arnold Vosloo - Darkman, Mummy

It's debatable as to whether it's a trilogy or not.

Hugo Weaving: Matrix, LOTR, Transformers
Ian McKellen: LOTR, X-Men
Matt Damon: Bourne Trilogy, Ocean's Trilogy, Good Will Hunting & Good Will Hunting 2: Hunting Season
Steve Guttenberg: Police Academy, Three Men and a..., Cocoon
Lance Henriksen: Aliens, Pumpkinhead (including DTV)?
Chuck Norris: Missing in Action, The Delta Force

Add "Gremlins" to Christopher Lee.

Robert DeNiro was in only one Godfather movie.

What the heck are the "Marvel superhero movies"?

Matt Damon - All 3 Bourne films & Ocean's 11,12,13

Bruce Spence: Mad Max, The Matrix, Star Wars, Lord of the Rings, The Chronicles of Narnia

3 Martin Lawrence: House Party 1 & 2, Bad Boys, Big Momma's House
3 Antonio Banderas: Shrek, Spy Kids, Desperado & Once Upon a Time in Mexico
3 Dan Akroyd: The Blues Brothers, My Girl, Ghostbusters
2 Both Jack Lemmon and Walter Matthau: The Odd Couple, Grumpy and Grumpier Old Men
2 Danny Trejo: Spy Kids, Desperado & Once Upon a Time in Mexico (Same could be applied to Salma Hayek)
2 Steve Martin: Cheaper by the Dozen, The Pink Panther
2 Sigourney Weaver: Ghostbusters, Alien
2 Michael Douglas: Jewel of the Nile/Romancing the Stone, Wall Street
2 Charlie Sheen: Hot Shots!, Wall Street
2 Jeff Bridges: Tron, The Last Picture Show/Texasville
2 Joe Pantoliano: Bad Boys, The Fugitive/U.S. Marshals
2 Burt Reynolds: Smokey and the Bandit 1 & 2, The Cannonball Run 1 & 2

He was only in the second one though, right?

The OP just says "involved," so I assumed the actor only had to be in at least one movie.