[11:06] (L-R) Cast members Michael Caine, Jane Fonda and Harvey Keitel, director Paolo Sorrentino, and cast member Rachel Weisz pose on the red carpet as they arrive for the screening of the film "Youth"
From left: Cast members Michael Caine, Jane Fonda and Harvey Keitel, director Paolo Sorrentino and cast member Rachel Weisz pose on the red carpet as they arrive for the screening of the film "Youth," in competition at the 68th Cannes Film Festival in Cannes, France, May 20, 2015. Reuters/Eric Gaillard

Septuagenarian actress Jane Fonda looked stunning in an Elsa Schiaparelli Haute Couture gown at the premiere of her new film, “Youth,” at the Cannes Film Festival on Tuesday. The Academy Award winner seemed at ease in the adventurous number. She looked relaxed and took things up a notch as she posed for the cameras on the red carpet along with her co-stars.

Some of the famous names joining the legendary actress included Rachel Weiz, Harvey Keitel and director Paolo Sorrentino. Fonda's dramatic black gown had a long bright pink trail that was attached to her waist. Jane’s ensemble featured a jagged neckline and an off-the-shoulder black bodice with long sleeves.

The blonde actress accessorized her ensemble with a stunning silver and red chunky necklace. She also wore matching diamante earrings. Her makeup consisted of mascara, eyeliner and some pink lipstick. Her longs fingers had a fresh pink manicure matching her gown, and she carried a small, black glittery clutch.

The 77-year-old beauty tied her blonde hair into a messy updo. Jane’s red carpet appearance comes after she was pictured getting rather frisky with fellow actor Harvey Keitel earlier in the day. The mum of three, whose father was the film actor Henry Fonda, is no stranger to such high-profile events and photo calls and was perfectly at ease on the red carpet.

Her stylist, Tanya Gill, told People that the gown took months to make. She added that all her Cannes dresses were custom-made. The British stylist, a Los Angeles resident, said that all the necessary prep work for Jane’s dresses was done in Milan, Paris and New York.

Gill said the actress knows exactly what she looks good in. For Jane, the formula includes long sleeves, floor-length cuts and anything that plays up her pert posterior. “She likes to cover her arms -- she has beautiful arms, but she prefers to cover them. We’ve also played around with cutouts a lot lately,” Gill revealed.

The stylist also revealed that comfortable shoes were an important aspect of Jane’s style. Tanya said that they always do a 2-inch kitten heel for Jane instead of a 5-inch high heel. And the best part of it all, Gill said was often the dresses or jumpsuits are cut long, and as the actress has long legs, people think she is wearing 4-inch heels.