Nicole Kidman's daughter is the youngest 2026 Met Gala guest. Sunday Rose, who Kidman, 58, shares with ex-husband Keith Urban, got special treatment at the 2026 Met Gala on Monday, May 4. For the event, which was themed "Costume Art" with a "Fashion Is Art" dress code, Sunday attended as Kidman's plus one - at only 17 years old. The Met Gala famously has an 18+ age limit, but the fundraiser seemingly lowered the rule for Sunday as she joined her mom, who served as a cochair. On the red carpet, Sunday and Kidman opened up about her look, telling Vogue she wanted to "blossom.