Fiona is a character on the HBO series Entourage who is played by actress and comedian Ari Graynor. Fiona is a neurotic and egotistical young woman who works as the assistant to Hollywood agent Ari Gold (Jeremy Piven). Fiona is typically seen in the company of her dog, Jerry, and her pet iguana, Vic. Fiona is the personal assistant to Hollywood mogul, Vincent Chase.
She first appears in the first episode of the second season, and quickly becomes a popular character among the show’s fans. Fiona is smart, funny, and loyal — and she knows how to get what she wants. She’s often able to solve problems or get things done faster than anyone else in the office, thanks to her extensive knowledge of both Vincent Chase and Hollywood.