When it comes to Joan O’Brien’s career highlights, one film that really stands out is The Comancheros from 1961—it’s widely regarded as her highest rated movie. Over the years, critics and fans alike have praised her performance in this classic, making it a standout moment in Joan O’Brien’s filmography. On the other hand, if we look at the lower end of the spectrum, It Happened at the World’s Fair (1963) tends to receive less favorable reviews, marking it as Joan O’Brien’s lowest rated film to date. While it still has its charm, especially for die-hard fans, it just doesn’t quite match the acclaim of her earlier work. So, whether you’re exploring Joan O’Brien’s most celebrated roles or diving into the lesser-known parts of her career, these two titles offer a clear contrast in reception. Joan O’Brien definitely left her mark during Hollywood’s golden era, and her performances continue to be discussed by movie enthusiasts today.