20th Century Fox is marking the end of filming on Steven Spielberg's remake of West Side Story with a heartfelt Twitter post complete with photos and a letter from the director. Spielberg's West Side Story brings to life the musical from Leonard Bernstein, Stephen Sondheim, and Arthur Laurents inspired by William Shakespeare's Romeo and Juliet. Transported to the mid-century Upper West Side, West Side Story follows star-crossed lovers Tony (Ansel Elgort) and Maria (newcomer Rachel Zegler) whose romance is threatened by the ongoing feud between the gangs at the heart of their respective communities. Based …