Once engaged, Diana and Gregory were certain they would hold their big, elegant wedding in central Los Angeles, where they live. The Ebell was a showstopper for them both, even when they viewed it empty, and was one of the only venues that had the capacity to hold all their guests. To help them plan everything, they hired Christine from XOXO Weddings.

To walk down the aisle, Diana wanted to find something with a modern silhouette and stumbled upon LOHO Bride—an entire boutique of exactly what she was looking for. "I knew before I tried on my first dress that I would make my final decision there," she says. The bride ended up choosing a Chosen by One Day fully beaded gown with lavish sleeves that had a rock-n-roll-meets-the-'20s vibe. To complete the look, she Diana had her tailor create a removable, tulle, sweeping cape in lieu of a veil.

For beauty, Keith London, who has also cut Gregory's hair since he was a teen, helped her create an Old Hollywood-inspired low bun and applied a natural makeup look with a touch of sparkle. And speaking of the groom, he wore an Armani tuxedo with cufflinks that featured portraits of both sets of his grandparents and Ferragamo shoes.

Indoors on April 27th, Diana preceded her bridal party and stood on the Juliette balcony, as each of her bridesmaids hugged her and walked past. Then Gregory sweetly went to meet his bride at the stairs and led her to the altar, decorated with an explosion of yellow flowers. One of their oldest family friends officiated the ceremony, and the couple read their own vows. "I cried with joy pretty much throughout the whole thing," Diana says.

Once announced as married, the reception began with a cocktail hour in the art room and garden, where large-scale sculptural floral arrangements by Isa Isa Floral and a floating wall of familial wedding portraits going back generations greeted guests. Dinner was in the ballroom, and the newlyweds sat together on stage. After the meal of vegetarian Wellingtons, sea bass, and harissa chicken, the new Mr. and Mrs. went back into the art room to cut their architectural wedding cake by The Butter End (with some difficulty) and serve pastries and gelato for dessert.

Back in the ceremony room, the pair had a surprise for everyone—The Band That Fell 2 Earth, a David Bowie tribute band that had everyone dancing all night. The two had their first dance to "Rock n Roll With Me." "It's a relatively unknown track from Bowie's Diamond Dogs album and one of his few straight forward love songs," Diana explains. "The song actually was not in the band's repertoire, but they learned it just for us and performed it beautifully."

"We were supposed to make a grand exit 45 minutes before the end of the event, as Extreme DJ took over to play us out to 'Champagne Supernova,' but we were having so much fun that we couldn't bring ourselves to leave!" the bride exclaims. The happy couple ended up being the last to leave and soaked up every moment.