have any of the twilight cast members played in any other movies?

These are some of the films that I know the actors were in:

Kristen Stewart - Panic Room, Cold Creek Manor, Speak, Catch That Kid, Undertow, Fierce People, Zathura, The Messengers, In the Land of Women, The Cake Eaters, Into the Wild, Cutlass, Jumper, The Yellow Handkerchief, What Just Happened, Adventureland, New Moon(filming, yet to be released) and Welcome to the Rileys(post-production).

Robert Pattinson - Harry Potter and the Goblet of Fire, How To Be, The Summer House(yet to be released), New Moon(filming,yet to be released) and he has been in several made for TV films.

Peter Facinelli - (these are just SOME of the film's he has been in), Foxfire, Can't Hardly Wait, Dancer, Texas Pop. 81, The Big Kahuna, Supernova, Riding in Cars with Boys, Fastlane, The Scorpion King, Hollow Man 2, Finding Amanda, New Moon(filming,yet to be released) and Nurse Jackie(yet to be released).

Elizabeth Reaser - The Believer, Thirteen Conversations About One Thing, Emmett's Mark, Mind the Gap, Sweet Land, Stay, The Family Stone, The Wedding Weekend, Puccini for Beginners, Purple Violets, Against the Current, New Moon(filming, yet to be released).

Ashley Greene - King of California, Otis, New Moon(filming, yet to be released) and the following are in post-production, Summer's Blood, Skateland, Warrior.

Jackson Rathbone - River's End, Pray for Morning, The Valley of Light, Big Stan, Senior Skip Day, Hurt(yet to be released), Young Again(yet to be released), New Moon(filming, yet to be released), The Last Airbender(filming, yet to be released) S. Darko(awaiting release) and the following are in post-production, Dread and DaZe: Vol. Too (sic) - NonSeNse.

Nikki Reed - Thirteen, Man of God, Lords of Dogtown, American Gun, Mini's First Time, Cherry Crush, Familiar Strangers, Chain Letter(awaiting release), New Moon(filming, yet to be released) and the following are in post-production, Privileged and Last Day of Summer.

Kellan Lutz - Stick It, Accepted, Ghosts of Goldfield, Deep Winter, Prom Night, New Moon(flming, yet to be released) and Warrior(post-production).

Taylor Lautner - Shadow Fury, Cheaper by the Dozen 2, The Adventures of Sharkboy and Lavagirl in 3-D and New Moon(filming, yet to be released).

Robert Pattinson
2008 - Little Ashes # How to Be # The Summer House
2005 - Harry Potter and the Goblet of Fire
[TV] The Bad Mother's Handbook (2007) # The Haunted Airman (2006) # Ring of the Nibelungs (2004)

Kristen Stewart
2008 - Jumper # What Just Happened # The Yellow Handkerchief
2007 - Cutlass # Into the Wild # The Cake Eaters # The Messengers # In the Land of Women
2005 - Zathura: A Space Adventure # Fierce People
2004 - Undertow # Catch That Kid # Speak
2003 - Cold Creek Manor
2002 - Panic Room
2001 - The Safety of Objects

Jackson Rathbone
2008 - Hurt # Senior Skip Day
2007 - Big Stan # River's End
2006 - Pray for Morning
[TV] The Valley of Light (2007) # "Criminal Minds" (1 episode) # "The Cleaner" (1) # "The War at Home" (2) # "Beautiful People" (14) # "The O.C." (2) # "Close to Home" (1)

Ashley Greene
2007 - King of California
[TV] "Shark" (1 ep) # "Desire" (7) # "Crossing Jordan" (1)

Kellan Lutz
2008 - Deep Winter # Prom Night
2007 - Ghosts of Goldfield
2006 - Accepted # Stick It
[TV] "90210" (6) # "Generation Kill" (7) # "Heroes" (1) # "CSI: Crime Scene Investigation" (1) # "The Comeback" (8) # "Summerland" (2) # "Six Feet Under" (1) # "CSI: NY" (1) # "The Bold and the Beautiful" (1)

Nikki Reed
2008 - Familiar Strangers
2007 - Cherry Crush
2006 - Mini's First Time
2005 - American Gun # Lords of Dogtown # Man of God
2003 - Thirteen
[TV] "Reaper" (1 ep) # "Justice" (1) # "The O.C." (6)

Peter Facinelli
2008 - Finding Amanda # Reaper
2007 - Lily # That Guy # Battle Olympia
2006 - Arc # The Lather Effect # Hollow Man II
2005 - Enfants terribles # Chloe
2002 - The Scorpion King
2001 - Riding in Cars with Boys # Tempted # Rennie's Landing
2000 - Honest # Ropewalk # Supernova
1999 - Blue Ridge Fall # The Big Kahuna
1998 - Welcome to Hollywood # Telling You # Can't Hardly Wait # Dancer, Texas Pop. 81
1997 - Touch Me
1996 - Foxfire
1995 - Angela
[TV] Touch the Top of the World (2006) # Calm at Sunset (1996) # After Jimmy # An Unfinished Affair # The Price of Love (1995) # The Runaways # "Damages" (8 ep) # "American Dad!" (1) # "Enemies" (1) # "Six Feet Under" (9) # "Fastlane" (22) # "Law & Order" (1)

Elizabeth Reaser
2007 - Purple Violets
2006 - Puccini for Beginners # Shut Up and Sing
2005 - The Family Stone # Sweet Land # Stay
2004 - Mind the Gap
2002 - Emmett's Mark
2001 - Thirteen Conversations About One Thing # The Believer
[TV] "The Ex List" (6) # "Wainy Days" (1) # "Grey's Anatomy" (17) # "Standoff" (1) # "Saved" (13) # "Law & Order: Criminal Intent" (2) # "The Jury" (1) # "Hack" (1) # "The Sopranos" (1)

Taylor Lautner
# Cheaper by the Dozen 2 # The Adventures of Sharkboy and Lavagirl 3-D # Shadow Fury
[TV] "My Own Worst Enemy" (7) # "Love, Inc." (1) # "Danny Phantom" (3) # "Duck Dodgers" (2) # "What's New, Scooby-Doo?" (2) # "My Wife and Kids" (1) # "The Bernie Mac Show" (2) # "Summerland" (1)

Taylor Lautner - The Wild Dozen 2, Sharkboy and Lavagirl
Robert Pattinson - Harry Potter 4, How to be
Kristen Stewart - Fierce People, Jumper, Adventureland
Peter Facinelli - Reaper, Finding Amanda
Nikki Reed - Familiar Strangers, Mimi's First Time

That was just the ones I could think of...

I remember seing Kristen Stewart in "Into the wild" with Emile Hirsch.

robert patterson played in harry potter 4
as segric digery