Lilian Sumner Gilbert is a New Zealand fashion model based in New York City.

Sumner grew up between Wellington, Auckland and Napier, New Zealand with six sisters and one brother[2] Her mother is writer Barbara Sumner-Burstyn.

Her father is New Zealand film editor and Academy Award winner John Gilbert.

[3] She made her official runway debut with Hedi Slimane at Yves Saint Laurent.

[7] Sumner wrote and directed a short film in 2019 titled Lucan Asks Why starring Coco Gordon-Moore and Lilac Cianciolo.