In a noteworthy feat for an original title, Rian Johnson's whodunnit Knives Out has reached the $300 million mark at the worldwide box office.Knives Out's domestic total through Monday stands at $159.1 million, with an international tally of $140.9 million.The crime caper — which first hit theaters in late November — is the second-most successful original movie of 2019 at the global box office behind Quentin Tarantino's Once Upon a Time in Hollywood, which grossed $374.2 million.