Lilli Diamond is a classic vintage label to know—and Ariana Grande and her stylist Law Roach are tapped in.

Grande, 32 — who plays “good witch” Glinda in both “Wicked” and “Wicked: For Good” — performed in NBC’s “Wicked: One Wonderful Night” special in a whimsical pink butterfly covered gown on Thursday evening.

Grande went all-out for her first Wicked: For Good screening on November 7. Her stylist, Law Roach, sourced a vintage Lili's Diamond gown from Timeless Vixen, a secondhand boutique in Beverly Hills. Its debut year? 1950, making it a find fit for an Old Hollywood star.

Earlier in the evening, Grande channeled peak Glinda in a look straight from one of Paris’s leading couture houses. She wore a custom Givenchy by Sarah Burton number—a fitted, a-line dress with a dramatic, princess-worthy train attached at the back.

Ariana Grande has been forced to cancel her trip to Brazil for the world premiere of 'Wicked For Good' in São Paulo after an aircraft safety issue.

The pop star and actor said she was “beyond devastated” that she couldn’t attend the premiere due to a plane issue.

Ariana Grande and Michelle Yeoh joined their Wicked co-stars for a swanky night out at the Paris Opera on Friday evening ahead of the musical sequel's release. The actress, 32, who plays Glinda The Good in the fantasy films, looked sensational in a chic black gown with pink floral embellishments.

Ariana Grande forewent her ponytail for her appearance on France’s "Quotidien," revealing the exact color brown that she dyed her hair.