Twelfth Night is a theatre company dedicated to classical theatre and Shakespeare. With director Susan Guthrie at its head, Twelfth Night has done productions of Shakespeare plays all over the United States.

Twelfth Night is also directly involved in Shakespeare in the Classroom, a program dedicated to aiding teachers in teaching their students Shakespeare.

Susan Guthrie is a Regional Theatre Stage Director and a Master Teacher of Voice & Speech with specialization in language and verse literature. She directed and coached voice and speech for the Alabama Shakespeare Festival, served as vocal and verse coach for Steppenwolf Theatre Company, as well as faculty positions in voice and movement at Roosevelt and voice and speech at DePaul Universities. She has also directed for Victory Gardens, Lighthouse Theatre, and Whirlwind Performance Company.