People I didn’t know were Orthodox, until recently:
Tina Fey, from 30 Rock
Tom Hanks (attends St. Nicholas Church in Northridge, CA)
Troy Polamalu from the Steelers
Steven Delopoulos– the lead singer of Burlap to Cashmere. I know, right? You can hear it in his solo album, where he even includes background clips of Holy Week services.