This is a list of all the voice actors in the English Version of Gundam SEED.
Akira Ishida: Athrun Zala
Naomi Shindoh: Cagalli Yula Athha
Rie Tanaka: Lacus Clyne
Souichiro Hoshi: Kira Yamato
Akira Sasanuma: Dearka Elsman
Houko Kuwashima: Flay Allster, Natarle Badgiruel
Kinryuu Arimoto: Patrick Zala
Kotono Mitsuishi: Murrue Ramius
Mami Matsui: Nicol Amalfi
Megumi Toyoguchi: Miriallia Haw
Nobuyuki Hiyama: Muruta Azrael
Takayuki Inoue: Tolle Koenig
Takehito Koyasu: Mu La Flaga
Tetsu Shiratori: Sai Argyle
Tomokazu Seki: Yzak Joule
Toshihiko Seki: Rau Le Creuset
Akira Sasanuma: Martin Dacosta
Eiji Yanagisawa: Prof. Ulen Hibiki
Fumihiko Goto: Commander Tayling
Hideyuki Hori: George Glenn
Hiro Yuuki: Clotho Buer
Hiroshi Takemura: Marco Morassim
Hisao Egawa: Captain Hoffman
Houko Kuwashima: Via Hibiki
Isshin Chiba: Arnold Neumann, Ledonir Kisaka, Yuri Amalfi
Junichi Sugawara: Captain Gamov
Katsuhisa Houki: Gerard Garcia
Katsumi Toriumi: Dalida Lolaha Chandra II
Kazuya Nakai: Reverend Malchio
Kikuko Inoue: Caridad Yamato
Kiyomitsu Mizuuchi: Modine, Representative Homura
Kotono Mitsuishi: Ezalia Joule, Haro, Narrator
Kouzou Mito: Al Da Flaga, Ray Yuki
Kôzô Shioya: Al Jairi
Machiko Toyoshima: Yaru Ashman
Masashi Hirose: Sahib Ashman
Masayo Kurata: Mayura Labatt
Megumi Toyoguchi: Elle
Michiyo Yanagisawa: Erica Simmons
Minoru Inaba: William Sutherland
Naoki Tatsuta: Lewis Halberton
Naomi Shindoh: Birdy, Eileen Canaver
Ryohei: Orga Sabnak
Ryotaro Okiayu: Andrew Waltfeld
Sachi Matsumoto: Asagi Caldwell, Mana
Shigeru Shibuya: Jackie Tonomura
Shunichi Miyamoto: Shani Andras
T.M. Revolution: Miguel Aiman, Narrator
Toru Ohkawa: Lt. Cdr Biddaulph, Uzumi Nara Athha
Toshihiko Nakajima: Kojiro Murdoch, Tad Elsman
Toshihiko Seki: George Allster
Vivian Hsu: Aisha
Yasuhiko Kawazu: Fredrik Ades, Herman Gould
Yasuhiro Takato: Kuzzey Buskirk, Romero Pal
Yasunori Matsumoto: Haruma Yamato
Yousuke Akimoto: Siegel Clyne
Yuko Nagashima: Romeena Amalfi
ûsuke Numata: Ahmed El Fasi
Yuuko Satou: Juri Wu Nien