Advent Children - Voice Cast

North America

Cloud Strife: Steve Burton (Kingdom Hearts)
Tifa Lockhart: Rachael Leigh Cook (Josie and the Pussycats)
Aerith Gainsborough: Mena Suvari (American Beauty)
Sephiroth: George Newbern (Kingdom Hearts, FFX-2)

Japan

These are the voice acting credits for the Japanese version of Advent Children.

Cloud Strife: Takahiro Sakurai
Tifa Lockhart: Ayumi Ito
Vincent Valentine: Shougo Suzuki
Barret Wallace: Masahiro Kobayashi
Cid Highwind: Kazuyuki Yama
Yumi Kakazu: Yuffie Kisaragi
Cait Sith: Hideo Ishikawa
Red XIII: Masachika Ichimura
Marlene Wallace: Miyu Tsuzurahara
Sephiroth: Toshiyuki Morikawa
Zack: Kenichi Suzumura
Kadaj: Shoutarou Morikubo
Aerith Gainsborough: Maaya Sakamoto