Sławomir Pacek (born on 1 January 1967 in Starachowice, Poland) is a Polish actor and voice actor who provides voices in the Polish narration of Thomas and Friends.
He is best known for voicing Lancer from "Danny Phantom", Eric from "Kim Possible", Flavio and Pip from "Animaniacs", and Randall from "Monsters, Inc."
- Gordon (Hero of the Rails onwards, excluding Emily Saves the World and Samson at Your Service)
- Diesel 10 (Misty Island Rescue only)
- Farmer McColl (thirteenth season onwards)
- Farmer Trotter (thirteenth season onwards)
- Both he and Ariel Cister voiced Crash from "Crash & Bernstein" in their respective languages.
- He, Agnieszka Kunikowska, Sigbjørn Solheim, Janusz Wituch, Krzysztof Szczerbiński, Miłogost Reczek and Grzegorz Pawlak have all worked on "Danny Phantom".
- He, Agnieszka Kunikowska, Taisto Oksanen, Stan Limburg and Humberto Vélez have all worked on "Monsters, Inc.".