Music Theater Works (formerly Light Opera Works) is a resident professional not-for-profit musical theatre company in Wilmette, Illinois. It was founded in 1980 by Philip Kraus, Bridget McDonough, and Ellen Dubinsky.
Music Theater Works has presented over 75 productions of operetta and musical theatre at Northwestern University's 1,000-seat Cahn Auditorium. Since 1998, in addition to its three annual productions in this theatre, Music Theater Works also produces a fourth, more intimate show, in the 450 seat Nichols Concert Hall. The company performs all of its productions in English with orchestra.