Troian Bellisario has made her mark in a number of projects across several genres. Her TV career before "On Call" includes notable guest turns in shows like "NCIS" and "Suits," as well as the title she's best known for: Freeform's teen drama series "Pretty Little Liars," where she starred as central character Spencer Hasting throughout the show's duration -- and eventually also got to portray the villainous Alex Drake, Spencer's twin sister.

Meanwhile, Bellisario's movie résumé ranges from artsy drama and comedy to science fiction and outright horror. In 2015, she notably starred in the remake of Pascal Laugier's "Martyrs" (2008), one of the best (and most gruesome scary) horror movies ever filmed. While the U.S. version didn't quite reach the blood-spattered heights of the French original, Bellisario's own visibility has only continued to increase since that film ... and with her newest success story on Amazon Prime Video, her...