Atlantic Theater Company is an acting school and working company based on the theory of Practical Aesthetics developed by David Mamet and William H. Macy. The Atlantic Theater Company has its own two-year conservatory program, and is also part of New York University's Tisch School of the Arts.

Prominent actors trained in the Atlantic Theater Company include Felicity Huffman, Jessica Alba, Heather Burns, Rose Byrne, Eddie Cahill, Peter Facinelli, Matthew Fox, Bryan Greenberg, Clark Gregg, Kristen Johnston, Joey Kern, Camryn Manheim, Matt McGrath, Jesse Merz, Jason Ritter, Skeet Ulrich, and many more.

The Atlantic Theater Company also runs the off-Broadway Atlantic Theater.

Some theater companies/performing groups to come out of the Atlantic Acting School include: The Mobius Group, Bar Hoppers, Thirsty Turtle, Harvard Sailing Team, The Fifteenth Minute, and Riot.

Theatre companies