Australian fashion designer Carla Zampatti will be farewelled at a state funeral in NSW next week.

The general public is welcome to join the 10:30 am service at Sydney's St Mary's Cathedral on April 15th.

Zampatti, 78, died on April 3rd after a fall at an outdoor opera performance and had spent a week in hospital after the incident.

The mother-of-three and grandmother of nine set up her fashion famous label at the age of 24, with some of her designs being worn by Australia's most influential women, including Nicole Kidman, Princess Mary of Denmark and Julia Gillard.

“Carla has long been celebrated for making Australian women feel confident and elegant through her exceptional design, tailoring and understanding of the modern woman,” her family said in a statement.