Submit the script to a theater if you have good contacts. If you don't, think about attending a local open mic night. Take a scene or a good long monologue and perform it. Take business cards with you and hand them out. You can scope out local talent and get an idea of any people who would be good as certain characters. If you have a group of friends that can act, assemble a cast yourself and perform your play. There are usually exhibitions/contests where new artists and writers are featured.