Abby Sciuto, played by Pauley Perrette, was one of the most beloved characters on NCIS, but there are plenty of behind-the-scenes secrets that fans never knew about her. From surprising casting decisions to real-life controversies, here are five shocking facts about Abby Sciuto.

First, Abby was almost played by a completely different actress. Before Pauley Perrette landed the role, producers considered several other candidates. However, Perrette’s unique style and chemistry with the cast made her the perfect choice for the quirky forensic scientist.

Second, Abby’s gothic look wasn’t just for the show—Perrette had a deep connection to the style in real life. She even studied criminal science before becoming an actress, which made her portrayal of Abby even more authentic.

One of the biggest surprises is that Perrette left NCIS due to behind-the-scenes drama. Reports suggest a serious conflict with Mark Harmon, leading to her abrupt departure. While she hasn’t revealed all the details, she has hinted at a toxic work environment that forced her to walk away.

Even though Abby is gone, she remains a fan-favorite character, and many still hope for a surprise return. Whether that happens or not, her impact on NCIS will never be forgotten.