Matthew Quincy “Matt” Daddario (born October 1, 1987) is an American actor and the younger brother of actress Alexandra Daddario.
Daddario made his major film debut as Aaron in the romantic drama film Breathe In, directed by Drake Doremus. That same year, he had a supporting role as Channing in the Vince Vaughn-led comedy film Delivery Man, directed by Ken Scott. In 2014, Daddario portrayed Danny Ladouceur in the sports drama film When the Game Stands Tall, co-starring alongside Jim Caviezel, Laura Dern, and Alexander Ludwig. The film is based on the achievements of football coach Bob Ladouceur and the De La Salle Spartans, who set a record 151-game winning streak.
In 2015, he co-starred as Gabriel in the teen comedy-drama Naomi and Ely’s No Kiss List. In May 2015, it was announced that Daddario would portray Alec Lightwood on the Freeform fantasy series Shadowhunters, based on The Mortal Instruments series of novels by Cassandra Clare. The series began airing on January 12, 2016, and ended in May 6th 2019. Also in 2016, he starred in the remake of Eli Roth’s horror film Cabin Fever, directed by Travis Z.