Rehearsals are underway for the Belfast Maskers’ production of the rollicking musical comedy, “Once Upon a Mattress,” by Mary Rodgers, Marshall Barer, Jay Thompson, and Dean Fuller. This over-the-top re-telling of the classic fable, The Princess and the Pea, debuted in 1959 and made entertainment icon Carol Burnett an overnight star. The Masker’s performances will all take place at Belfast Area High School on July 17, 18, 19, 24, 25 and 26. All shows at 7 pm. Tickets sold only at the door, $15 for teens and adults, $10 for ages 12 and under. Cash and checks accepted. For more information, call 930-7090 or visit our website at www.BelfastMaskers.com.