Janusz Zadura is a Polish voice actor who dubs Grover on Świat Elmo (Elmo's World), Bawmy się, Sezamku (Play With Me Sesame), and Globtroter Grover (Global Grover).

Zadura's other dub credits include Monsieur Hood in Shrek, Onus in Tresure Planet, and Srge in Open Season, Hermes in Hercules, and additional voices on Justice League Unlimited, Johnny Bravo, and Heathcliff.