Paul Greenberg (also known as Aaron Albertus and Pierre Holloway in various shows; born 13 January, 1965) is a voice actor and writer who worked on The Mr. Men Show. He provided the voices of Mr. Bump and Mr. Quiet in the US version of the show. Paul also worked on the show as a writer for the episode Dillydale Day.
- The Mr. Men Show: Mr. Bump (US), Mr. Quiet (US) (credited under the name "Aaron Albertus")
- Yo-Kai Watch: Bear, Mr. Johnson, Manjimutt, Additional voices (credited under the name "Pierre Holloway" for the first season).
- Like with Cheryl Chase and Joey D'Auria, Paul went under a pseudonym in the credits. Despite this, he actually kept his real name when he wrote for the show.