In "Suits," Rafferty's character, Donna, ends up marrying Harvey, but in real life, the actor has been married for more than 20 years. Rafferty met her husband, financial analyst Santtu Seppälä, while studying at Yale to earn her MBA, according to Distractify. The couple married in June 2001 and have two children: Oona Gray (born 2007) and Iris Friday (born 2012).
In 2021, Rafferty wished her husband a happy anniversary in a heartfelt post on Instagram, writing "Happy 22, (one day late) Santtu. I love nothing more than seeing the world with you….and seeing our child troll us on instagram. How did she access photos from the 90's? 😂🤓🎾🌎🥂."