Katherine Grace McNamara (born November 22, 1995) is an American actress. She is known for her lead role as Clary Fray on the 2016–2019 Freeform fantasy series Shadowhunters. In 2018, McNamara joined the cast of Arrow for its seventh season, playing Mia Smoak, the daughter of Oliver Queen and Felicity Smoak.
McNamara was born in Kansas City, Missouri, the only child of Ursula and Evan McNamara, who served in the U.S. military. She was raised in Lee's Summit, Missouri, and moved to Los Angeles, California in 2011.
While growing up, McNamara was an advanced student in certain subjects, resulting in her being part-homeschooled; she received her high school diploma at age 14. At age 17, McNamara graduated summa cum laude with a Bachelor of Science degree in Business Administration from Drexel University, completing much of her course work online. In July 2017, she said that she was enrolled in an online master's degree literature program at Johns Hopkins University.