Mid-Atlantic English is a distinctive accent and dialect primarily associated with the upper-class and educated speakers in the northeastern United States, particularly in areas like New York City and Philadelphia. It blends elements of both American English and British English, resulting in a unique pronunciation and vocabulary. This accent was popularized in the early 20th century, especially in theater and film, as it was considered sophisticated and refined. It is characterized by non-rhoticity, where the "r" at the end of words is often not pronounced, and a distinct intonation pattern that sets it apart from other American accents.