Nickelodeon's Hey Arnold!" now has an official title, an official release year, and an official cast that includes 19 voice actors from the original show.

The network announced in a press release on Monday that the return of the '90s series would be called "Hey Arnold!: The Jungle Movie," and that title means exactly what fans are hoping. According to Nickelodeon, "The Jungle Movie" "picks up from where the original series ended in 2004 and will resolve unanswered questions and plotlines--including Arnold finally getting answers about the whereabouts of his missing parents."

Most of the original cast will return for the movie, though the actors behind BFFs Arnold and Gerald -- Lane Toran and Jamil Smith -- won't be voicing the protagonists this time around. Instead, they will be back as new characters in several other roles, according to the press release.

Other returning original voice actors -- who will be back in their same roles -- are:

Francesca Marie Smith (The Prince of Egypt) as Helga; Anndi McAfee (Tom and Jerry: The Movie) as Phoebe; Justin Shenkarow (Recess) as Harold; Olivia Hack (Family Guy) as Rhonda; Nika Futterman (The Boxtrolls) as Olga; Dan Butler (Frasier) as Mr. Simmons; Dan Castellaneta (The Simpsons) as Grandpa; Tress MacNeille (The Simpsons) as Grandma; Antoinette Stella (Melrose Place, writer) as Stella; Carlos Alazraqui (Happy Feet) as Eduardo; Dom Irrera (Back at the Barnyard) as Ernie; Maurice LaMarche (Futurama) as Bob Pataki; Kath Soucie (Rugrats) as Miriam; Danielle Judovits (Toy Story) as Big Patty; Danny Cooksey (The Lorax) as Stoop Kid; Jim Belushi (According to Jim) as Coach Wittenberg; and ["Hey Arnold!" creator] Craig Bartlett as Miles.

And the new actors -- including those playing Arnold and Gerald -- are:

Mason Vale Cotton (Mad Men) as Arnold; Benjamin "L'il P-Nut" Flores, Jr. (Game Shakers) as Gerald; Gavin Lewis (Real Boy) as Eugene; Jet Jurgensmeyer (Bubble Guppies) as Stinky; Aiden Lewandowski (Comedy Bang! Bang!) as Sid; Laya Hayes (Santa Hunters) as Nadine; Nicolas Cantu (The Impossible Joy) as Curly; Wally Wingert (Sonic Boom) as Oskar; and Stephen Stanton (Star Wars Rebels) as Pigeon Man.

In addition to all those familiar characters, Alfred Molina (Spider-Man 2) will play a new one named Lasombra, dubbed the flick's "resident villain" and described as "an infamous river pirate operating from a secret compound in the jungles of San Lorenzo."

"Hey Arnold!: The Jungle Movie" is set to hit Nickelodeon sometime in 2017.