When did Emma first become well known?

Emma Watson first became well-known for her role as Hermione Granger in the "Harry Potter" film series, which began with "Harry Potter and the Sorcerer's Stone" (released in 2001). Her portrayal of the character resonated with audiences, quickly making her a household name. As the series progressed, she gained further recognition for her acting skills and advocacy work, solidifying her status in both the entertainment industry and beyond.