From the Official Announcement:
Life in the big city is one big adventure for Arnold. Living with his grandparents, who run the Sunset Arms boarding house, Arnold shares a roof with a diverse and unusual menagerie of characters (including his pet pig!). But as any fourth grader knows, some of the most memorable people you’ll ever meet are in school. With friends like Arnold’s (including storyteller Gerald, class jinx Eugene, sometime-bully Harold, and the tomboy Helga, who harbors a secret crush on our hero), you can be sure that he’s got some funny exploits to share with fans.
Hey Arnold! features an all-star voice cast, including Dan Castellaneta (The Simpsons), Francesca Smith (Recess), Toran Caudell (Recess) and Jamil Walker Smith (SGU Stargate Universe). Created by Craig Bartlett as a comic in 1986, Hey Arnold! debuted as an animated short for the Nickelodeon film Harriet the Spy in 1996. Hey Arnold! went on to air on Nickelodeon from 1996 to 2001. The show also aired on "Nick on CBS" from 2002 until 2004. Whether you want to revisit your own childhood memories or create new ones with your kids, Shout! Factory has two words for you: Hey Arnold!