Mrs. Petrescu is a Romanian woman who lives on the second floor of Penny and Leonard's apartment. She is Amy and Sheldon's guest at brunch in their apartment - Apartment 4B.
According to Sheldon, Mrs. Petrescu watches American TV in order to learn English using some typical television phrases.
Mrs. Petrescu will make another appearance in "The Tenant Disassociation".
- She uses the term "filmed before a live audience" while recording that episode that is filmed before a live audience.