Benjamin Diskin is the Voice of Young Xehanort
Since the English trailer was released a few days ago, there was a lot of speculation revolving around who was the voice of Young Xehanort. Voice Actor Benjamin Diskin recently revealed on Facebook that he was the voice of Young Xehanort. For those that don’t know him, Diskin is the voice of Numbah One/Nigel Uno & Numbah Two/Hoagie P. Gilligan Jr. from Codename: Kids Next Door, Eugene Horovitz from Hey, Arnold!, Eddie Brock/Venom from The Spectacular Spider-Man, Sai from Naruto Shippuden, and Harm from Young Justice. You can view his response below.
Source: KHInsider, Behind the Voice Actors