Rob Letterman (Goosebumps, Monsters vs. Aliens) is directing the Pokemon film from a script written by Nicole Perlman (Guardians of The Galaxy) and Alex Hirsch (Gravity Falls). Detective Pikachu will be called upon to search for the missing father of Smith's character, while Newton will portray a journalist who gives them a much needed assist.
Filming on the project is expected to start soon.
Gotta catch 'em all!
Batten down the hatches: Met Éireann issue warning to 7 counties
Forecasters had earlier warned it will be "bitterly cold" for the rest of the week despite a mild day today. Met Eireann has already issued an extended weather warning ahead of Storm Caroline on Thursday.
It's due to begin shooting in mid-January in London. Reynolds' role is said to be motion-capture in nature. Ryan Reynolds will star as Detective Pikachu in the movie of the same name.
The new film will be based on the already-successful franchise, introduced with video games in Japan in 1996.
As the title suggests, Detective Pikachu isn't just pulling any ol' Pokemon property, which have traditionally focused on trainers who collect the cuddly, but powerful creatures called Pokemon to compete in battle tournaments.
Before he goes yellow, Reynolds will return as his foul-mouthed mercenary in next year's Deadpool 2.