Due to her character's omnipresence in the "One Chicago" universe, the vast majority of Marina Squerciati's life in front of the camera has obviously revolved around "Chicago P.D." and its sister shows. She's had brief one-episode appearances in shows like "The Good Wife" and "Blue Blood," but when it comes to significant non-"One Chicago" roles, you're most likely to remember her from The CW's "Gossip Girl."
Squerciati plays Alessandra Steele, a prominent recurring character in the show's Season 5. Alessandra is a publicist who's responsible for promoting Dan Humphrey's (Penn Badgley of "You" fame) book, "Inside." Despite her unconventional tactics — like anonymously trolling Dan on Twitter to rile him up and draw attention to the book — she proves to be a very capable and dependable person, even though Dan's various issues eventually cause their personal and professional relationship to sour.
Though Squerciati's "Gossip Girl" tenure only lasted for eight episodes, she left a lasting legacy. "Gossip Girl" fans on Reddit have been delighted by Alessandra's fake "@ihatehumphrey" Twitter account, and the fact that a real Twitter profile with that name (and theme) actually exists has kept the character's memory alive.