The Australian actress, 56, looked dazzling in a white corset gown with a black ruffled skirt and white opera gloves. Her long blonde hair, styled by Adir Abergel, was worn in an effortless straight style. Meanwhile, Urban, also 56, rocked a classic black tuxedo.

Urban even compares trying to wow Kidman at his shows to how he always wanted to make his dad proud. “I feel like I’m still trying to make my dad proud, and I think my dad was proud years ago,” he explained. “My dad’s not even alive anymore and I still feel like I’m trying to get his approval. Certain things just stay part of my fire.”

Designed by creative director Demna Gvasalia, the dramatic dress is a nod to the original Spanish designer's flamenco-inspired silhouette.

Keith Urban tells PEOPLE that he still tries to "impress" wife Nicole Kidman with his concerts. The country singer just announced a 10-show residency at Fontainebleau Las Vegas.

Keith Urban says his wife Nicole Kidman’s presence at his concerts makes him want to ‘impress’ her with his performance

Kidman, epitomized timeless sophistication in a custom-made Balenciaga gown, a modern reinterpretation of a 1950s Cristobal Balenciaga Couture creation