The metal details gave the Savage X Fenty designer the illusion of gold hair and further accented the ensemble's overall industrial vibe.

As Williams noted, "It was all about matching the sculptural feel of the outfit and staying aligned with the team’s vision; strong, timeless, and intentional from every angle."

And, because Rihanna's hair was such a focal point of the outfit, Williams reached for True Indian Hair Company’s True HD Lace RTW Collection Ava wig for the iconic red carpet moment.

"Using an HD lace front gave us a seamless blend and install, while offering versatility and natural movement, while still allowing for structure," he told Vogue, "which was needed given added gold wire pin curls."

All that time and planning certainly paid off as Rihanna shined bright like a diamond on the Met Gala staircase alongside partner A$AP Rocky like only the "Umbrella" singer can.

For the date night, the rapper—dad to kids RZA, 3, Riot, 2, and Rocki, 7 months, with the singer—rocked a custom Chanel by Matthieu Blazy look that consisted of a bubblegum pink wool robe with black satin lapels, black trousers and dress shoes with a small, apple-shaped bag in his hands.

Keep reading to see Rihanna and A$AP and more celebrity couples on the Met Gala red carpet.