Yesterday AniplexUSA have uploaded a brand new video showcasing a trailer for the upcoming dub release of Sword Art Online. You can see the trailer below.
The Current known Voice actors for the dub can be seen below:
Kirito - Bryce Papenbrook, known for voicing Rin Okumura in Blue Exorcist
Asuna - Cherami Leigh, known for her roles as Shana in the Shakugan No Shana dub and as Lucy Heartfellia in Fairy Tail's dub
Leafa - Cassandra Lee Morris, Voice of Leo and Luna in the Yugioh 5Ds dub from episode 13 - 54.
Silica - Christine Marie Cabanos, voice of Shiemi Moriyama in Blue Exorcist
Lisbeth - Sarah Anne Williams, known for voicing Sayaka Miki from Puella Magi Madoka Magica and Peacock from Skullgirls
Agil - Patrick Seitz, known for voicing Franky in One Piece's dub and Laxus in Fairy Tail's dub, aswell as many other animes like Bleach and Blue Exorcist