The rock is out of her pocket.

Zoë Kravitz attended jeweler Jessica McCormack’s cocktail event in London Wednesday, giving fans the clearest look yet at her massive sparkler from fiancé Harry Styles.

The “Blink Twice” director, 37, paired the bauble with a one-shoulder bias-cut silk slip dress and Christian Louboutin silver satin slingback pumps, stacking silver bangles and a sculptural bicep cuff with an equally large diamond on her left arm.

The look read decidedly bridal — appropriate, considering the night’s host is believed to have designed Kravitz’s engagement ring. The “Big Little Lies” star is McCormack’s first brand ambassador, and co-hosted the soirée at the Mayfair townhouse.

Diamond experts previously told Page Six Style the elongated cushion-cut stone is likely worth anywhere from $600,000 to $800,000, coming in at 10 to 12 carats.

“The bezel setting frames the diamond in yellow gold rather than using traditional claws, which gives the ring a cleaner and more modern feel,” Lorel Diamonds’ Laura Taylor said of the ring.

The outing offered the closest peek at the stone since Page Six exclusively confirmed the proposal in April. Shortly after, Kravitz tucked her left hand into the pocket of her Saint Laurent gown at the 2026 Met Gala, keeping it out of view on the red carpet.

She loosened up last month, flashing the diamond on the dance floor at the opening of Styles’ “Together Together” tour in Amsterdam.

Kravitz was joined at the McCormack bash by Jodie Comer and Carey Mulligan, and was later photographed leaving the private members’ club Harry’s Bar.

Sources have told Page Six she and Styles are eyeing a low-key UK wedding around Christmastime, possibly followed by a second celebration in New York for her rocker dad, Lenny Kravitz.

The couple recently debuted matching “Let It Rip” tattoos — a permanent token to go with the diamond.