Here is a list of the major actors and their roles in Wicked the Musical.

The cast for Wicked on Broadway 2007:
Kate Reinders is Glinda
Michael DeVries is the Witch's Father
Katie Webber is the Witch's Mother
Kathy Santen is the Midwife
Ana Gasteyer is Elphaba
Cristy Candler is Nessarose
Logan Lipton is Boq
Jayne Houdyshell is Madame Morrible
Steven Skybell is Doctor Dillamond
Derrick Williams is Fiyero
Michael DeVries is the Ozian Official
David Garrison is The Wonderful Wizard of Oz
Manuel I. Herrera is Chistery

The original Wicked on Broadway cast was:
Kristin Chenoweth is Galinda
Sean McCourt is the Witch's Father and the Ozian Official
Cristy Candler is the Witch's Mother
Jan Neuberger is the Midwife
Idina Menzel is Elphaba
Michelle Federer is Nessarose
Christopher Fitzgerald is Boq
Carole Shelley is Madame Morrible
William Youmans is Doctor Dillamond
Joel Grey is The Wonderful Wizard of Oz
Norbert Leo Butz is Fiyero
Manuel Herrera is Chistery
Melissa Fahn is Dorothy

The cast for Wicked on Tour 2007 is:
Christina DeCicco is Glinda
Paul Slade Smith is the Witch's Father in addition to the Ozian Official
Lori Holmes is the Witch's Mother
Barbara Tirrell is the Midwife
Victoria Matlock is Elpheba
DeeDee Magno Hall is Nesarose
Josh Lamon is Boq
Alma Cuervo is Madame Horrible
K. Todd Freeman is Doctor Dilamond
Cliffton Hall is Fiero
PJ Benjamin is The Wonderful Wizard of Oz
Kyle Hill is Chistery