Allison Christin Mack is an American actress. She portrayed Chloe Sullivan on the WB/CW superhero series Smallville (2001–2011), where she appeared in all 10 seasons. Mack was also featured in a recurring role on the FX comedy series Wilfred (2012; 2014). Outside of her acting career, Mack was a member of NXIVM, a sex cult posing as a multi-level marketing company. In 2018, she was arrested on charges of sex trafficking, sex trafficking conspiracy, and forced labor conspiracy in relation to NXIVM activities. She pleaded guilty to racketeering charges and was sentenced to three years in prison in 2021.