Khloe Kardashian flaunted her revenge body to sizzling advantage in a new campaign for her sister Kourtney's brand Lemme.

The sisters were promoting a new line of Lemme creatine gummies, which are billed as helping to promote 'body toning' and 'cognitive health.' 

In a suite of photos and videos posted to Instagram, Khloe, 42, showed off her statuesque legs in workout gear that also hinted generously at her derriere.

'Lemme Theme- Jane Fonda 80s core,' wrote Khloe, whose retro look included an off-shoulder t-shirt with its hem in a knot over a crimson sleeveless bodysuit.

Heightening the 1980s motif, she swept her hair up into a high ponytail and accessorized her gym apparel with a stack of gold bangles. 

Meanwhile Kourtney, 47, gave off an air of the 1990s in a set of highlighter green striped bike shorts over a boyfriend fit print t-shirt.

The Kardashians have a longstanding history with Fonda, who used to go to the same manicurist as Kourtney and Khloe's sister Kim, 45. 

A few years ago Fonda shared her fond recollections of chatting with Kim at the nail salon, saying: 'She's very friendly, just one of the gals,' during an interview she gave to Andy Cohen on Watch What Happens Live.

Their paths crossed again at the annual pre-Grammy party thrown by music mogul Clive Davis, who died this Monday at the age of 94.

'And I was kneeling on the floor talking to Gladys Knight, because Georgia's my second home and Gladys lives in Georgia,' said Fonda.

When she turned around to stand, the Barbarella star was confronted with the sight of Kim's world-famous backside 'right in my face.' 

She was so impressed she could not help but tell Kim: 'I've just been staring at your behind at it's beautiful,' to which the reality star evidently had a 'very sweet' reaction. 

Khloe's homage to Fonda comes more than four decades after the Klute star released her smash hit 1982 videotape Jane Fonda's Workout.

Lapped up all over America, it became the bestselling VHS for six years and remains one of the most successful videotape releases in history.

Fonda ventured into the exercise industry to fundraise for left-wing political causes including a PAC run by her philandering alcoholic then-husband Tom Hayden, who had been one of the Chicago Seven.

Having been advised to 'never go into a business you don't understand,' she had a brainwave: 'The workout! If there's one thing I understand it's working out.'

In her HBO documentary Jane Fonda in Five Acts, she said the tape was made with 'one camera' and added: 'There were no teleprompters or anything like that.'

She dished: 'I wrote the script sitting on a floor of a hotel room. We did our own hair and makeup. I mean, it was a spit and a prayer - and the rest is history.'

Fonda, who had veered between anorexia and bulimia as a younger woman, was catapulted at once to a position as the reigning figurehead of American fitness. 

After the runaway success of her original workout tape, she released multiple more and in her later years broke into exercise DVDs targeted at older women.