Irish musician GLEN HANSARD is grateful for his role in hit new musical ONCE - because it gave him the chance to woo his co-star. The 37-year-old The Frames singer admits he had long admired teenage Czech actress Marketa Irglova, but never had the chance to act on his feelings - until they were cast as lovers in the sleeper hit. He says, "I had been falling in love with her for a long time, but I kept telling myself, 'She's just a kid.' "There was definitely the feeling that we were documenting something precious and private."