Jim Cummings

Jim Cummings voiced Winnie the Pooh and Tigger in Christopher Robin.

Trivia

 * Cummings has been the voice of Winnie the Pooh since 1988 and Tigger full time since 1999 (though partially since 1989).
 * Chris O'Dowd was originally cast to voice Tigger in the film, but he was replaced with Cummings in the final film due to test audiences not finding O'Dowd's take on Tigger with a British accent that very fitting for the character.