Waltz would play an Interpol inspector in the sequel to last year's hit, which re-launched the long running Jim Henson-created franchise. The film is expected to be set in Europe.
Waltz is best known for his Academy Award-wining performance in Quentin Tarantino's Inglorious Basterds and can be seen next in Tarantino's Django Unchained.
Much like the last year's Muppets movie, this sequel is expected to have a slew of cameos. The Interpol inspector role is one of a handful of human roles, which also include a Russian femme fatale and a male lead whose intentions are always in question.
Which actors would you like to see appear in The Muppets 2?