The present study explores the ways in which English is used in public discourse in Tehran-Iran and the motivations of Iranian - English as a Foreign Language (EFL) learners and teachers towards English language learning. The paper begins with an overview of different places in which English is used in Iran, such as media, public signs, traffic signs, advertisements, products, people's ordinary lives, and education. A cohort of 327 participants, including 168 Iranian EFL learners (male and female) and 159 experienced Iranian EFL teachers (male and female) responded to an English language motivation questionnaire. The results revealed that there is an active presence of English in Iran. In addition, the majority of Iranian EFL learners and teachers involved in the study regard English as an important part of their lives for many and various reasons such as being up-to-date, love, education, learning a new skill, being promoted, having a better and more highly qualified job and increased life chances.