If you weren't familiar with Colleen Hoover's best-selling novel, the box office success of It Ends With Us may have come as a total surprise. The film opened to $50 million during its debut weekend, and while that success might have come as a shock to anyone who hasn't read the source material, fans of Hoover's novel were bound to make the film version a hit. In the subsequent weeks since its release, It Ends With Us has continued its successful run, and it just hit a major milestone.