Matthew Louis Shear is an American actor known for his work in independent film and frequent collaborations with director Noah Baumbach. He began his career with a small role in Taking Woodstock (2009) and appeared in Mistress America (2015), The Meyerowitz Stories (New and Selected) (2017), and Marriage Story (2019), and played Lucius Isaacson on The Alienist (2018–2020). In 2025, he made his directorial debut with Fantasy Life, which he also wrote and starred in.

Matthew Shear

Acting Born October 10, 1984 New York City, New York, USA

Matthew Louis Shear is an American actor known for his work in independent film and frequent collaborations with director Noah Baumbach. He began his career with a small role in Taking Woodstock (2009) and appeared in Mistress America (2015), The Meyerowitz Stories (New and Selected) (2017), and Marriage Story (2019), and played Lucius Isaacson on The Alienist (2018–2020). In 2025, he made his directorial debut with Fantasy Life, which he also wrote and starred in.

Known For

The Alienist

Lucius Isaacson

Love Life

Ben

Old

Sidney

Marriage Story

Terry - Theater Actor

Horace and Pete

Zach

While We're Young

Benny

Taking Woodstock

Earthlight Player

Between the Temples

Nat

The Meyerowitz Stories (New and Selected)

Gabe

Mistress America

Tony

Fantasy Life

Sam

Don Peyote

Zebra Shaman