Katherine 'Kat' Grace McNamara (born November 22, 1995) is an American actress. She is known for her roles as Harper Munroe on the MTV comedy series Happyland, and Clary Fray on the Freeform fantasy series Shadowhunters.
- Title: Katherine McNamara
- Popularity: 14.804
- Known For: Acting
- Birthday: 1995-11-22
- Place of Birth: Kansas City, Missouri, USA
- Also Known As: Kat McNamara, Κάθριν ΜακΝαμάρα, 캐서린 맥나마라