On Sunday, the 71-year-old wore an apple green sequinned gown with a plunging neckline to attend both the Elton John AIDS Foundation Academy Awards Viewing Party and the Vanity Fair Oscar Party.
Seymour glowed in the glamorous $874 CAD/ $650 Halston frock, showcasing her ageless beauty and toned physique while posing for pictures at the star-studded event. The star accessorized the look with a sparkling diamond accessories, opting for brown smokey eye makeup and glossy pink lips.
The British beauty and wore her long auburn locks in a half-up half-down style that tumbled down her back for a look that channeled her "Dr. Quinn, Medicine Woman" hairstyle from the ‘90s.
"It’s Oscars night!," Seymour wrote to fans on Instagram. "Heading off to my friend Elton John's party followed by the Vanity Fair party — so excited! Special appearance of my Dr. Quinn hair!"
Fans couldn't get enough of Seymour's daring look and of course, the throwback hairstyle.
"Gorgeous as always! Love that colour on you and of course, your Dr. Quinn hair. Have an amazing night!" raved a fan on Instagram.
"Dr. Quinn hair... Love it!" wrote another fan. "I miss this show so much!"
"Jane is queen," another said. " Love the hair so much."
Fans also praised Seymour for breaking barriers with her 'age-defying' look.
"Who ever said older women can't wear plunging V-necks is totally wrong," a follower said. "She rocks this look."
"OMG this bright green is everything," wrote one fan on Twitter. "Jane rocks this super fun and age-defying colour."
"Does this woman ever age? Timeless elegance if I do say so myself!" said another.
When asked what her advice would be when it comes to age-defying beauty, Seymour told Hello! that the secret is “a bit of exercise,” but reluctantly admitted that she doesn’t actually work out that often.
“Take care of your skin, take care of your health, eat fresh vegetables and fruits, and all the usual stuff,” she said.