The Girl Who Knew Too Much (1963) is a Horror, Thriller, Mystery film that follows a tourist witnesses a murder and finds herself caught up in a series of bloody killings. Currently, you can watch The Girl Who Knew Too Much on Amazon Prime Video, AMC Plus Apple TV Channel , AMC+ Amazon Channel, AMC+. Streaming availability may vary by country and platform over time. It has a user rating of 6.9 out of 10 from 187 votes. Fans of horror movies may also want to explore similar titles below.