The actor has already provided the voice for the bear for two films that were critical and box office hits.
The series for pre-schoolers will be a 3D CG-animated series, which follows the adventures of a younger Paddington.
It is being made by StudioCanal, the same company who made the movies, and will air on Nickelodeon's networks worldwide in 2020.
David Heyman who produced the Paddington films, as well as all the Harry Potter films, will be the series' executive producer.
