Régis Fassier (b. 1963) is a French puppeteer who plays Nac, on the current Sesame Street co-production 5, Rue Sésame; Nac is also the mascot of broadcaster France 5. Fassier also played Bag on Sacatruc, the French Big Bag co-production, and puppeteered on Muppets TV.
Fassier played Footix, the 1998 World Cup soccer mascot. He and Yves Brunier both played Casimir on Casimir Show.