Haylie Ecker (born 9 October 1975) is an Australian performer, writer, artistic director, and the former first violinist and co-founding member of the multi-platinum selling classical crossover string quartet Bond. With Bond she sold over 4 million records and accrued 43 platinum and gold records internationally. She left Bond in 2008 to become a mother. She plays a 1751 J.B. Guadagnini.