Kate Beckinsale, Emma Roberts and Camilla Cabello wear long black dresses for Summer Gala

Stars opted for simple yet chic long black dresses for this year's Summer Gala.

Hosted by Gala One in Saint-Tropez, France, the unique benefit brings notables together to support a variety of charities that support the preservation of ecosystems and sustainable futures for children. Past beneficiaries have included Well/Beings, One Drop, Amend and more.

British actress Kate Beckinsale posed on the gala's red carpet on Tuesday, donning a black, fitted strapless dress for the occasion that featured a deep plunging neckline and a big, embellished gold bow with rose-shaped appliqués.

She paired the look with a leopard print bangle, rings, gold drop earrings, platform heels and a headband placed over her voluminous old Hollywood hairstyle

Beckinsale's striking look seemed to be in line with her recent bow-wearing streak: The actress previously wore a big black bow in her hair while attending the King's Trust Gala in May.

The "Jolt" actress wasn't the only one who posed for the grassy green carpet in a stunning long black ensemble. Fellow actress Emma Roberts and singer Camila Cabello also went for the dark hue.

Roberts wore a strapless Fendi gown that included a foldover bodice top. She completed the look with subtle gold jewelry and loose blonde curls.

Cabello went for an alluring halter neck dress that featured a thigh-high slit and ruching. The singer's look was complete with sheer pumps.