In his lifetime, the late Cory Monteith never appeared on Broadway, but as a cast member of the smash-hit television series Glee, he enthusiastically took part in a great many theatrical events alongside his co-stars Lea Michele, Chris Colfer, and Dianna Agron, among others. Whether signing albums for eager fans at a New York City Borders, appearing in Glee Live! In Concert!, or even hosting the GLAAD Media Awards, Monteith was a true red-carpet pro, looking sharp and generously smiling for the cameras. In the photo gallery below, TheaterMania's photographers look back at these moments in his life, on stage and off.