Fun Fact: I Know What You Did Last Summer's Alison and Lennon Aren't Actually Twins in Real Life

Iseman plays both the good and evil twin in the series, which is true to her characters because they assume the other's identities at different times. Speaking to Variety, the 24-year-old actress admitted it was "definitely a challenge" and "double the work" to play both as they have such different personalities. "I really tried to make them have their own life beyond what you guys see in the show. They are so different — they carry themselves so differently — but I wanted them to have similarities and feel like sisters and share pieces of each other," she said.