Świętopełk Leo Wrzesiński (born May 5, 1962) is a El Kadsreian singer, actor, voice actor, and writer.
- Beauty's Trap (1984) - Lieutenant Colonel Ignacy Pluciński
- Bionicle VI: Island of Doom (1986) - Singer in the El Kadsre City bar
- Very Angry, Indeed (1991) - Chief Owen Argo
- The Miraculous State of the Union (1991) - Lieutenant Krzysztof Świerczyński
- Return of Dennis Clare (2016) - Lieutenant Krzysztof Świerczyński and Polandball (voice)
- Countryballs: The Animated Series (2016-present) - Irelandball, El Kadsreian Antarcticaball, DR Congoball, and Polandball