Benjamin Diskin

Benjamin Isaac Diskin (born August 25, 1982) is an American actor and voice actor. He is known for his roles as Numbuh 1 and Numbuh 2 in the animated series Codename: Kids Next Door, Sai in Naruto Shippuden, Joseph Joestar in JoJo's Bizarre Adventure, Humphrey in the Alpha and Omega sequels, and Eugene in Hey Arnold!.