Kayla Itsines is officially the top female on The Young Rich List

The success of fitness app Sweat has swelled the fortunes of its founders, Kayla Itsines and Tobi Pearce, making them some of Australia's richest young people.

H Kayla Itsines ανάμεσα στην γιαγιά και τον παππού της Source: Supplied

Helping people whittle down their waistlines has fattened the fortunes of fitness guru Kayla Itsines, propelling her into the ranks of Australia's richest young business people.

Ms Itsines and her partner Tobi Pearce are the brains behind the Bikini Body Workout program and fitness app Sweat.

With 20 million followers they've amassed a combined fortune of $486 million, according to the Australian Financial Review's Young Rich List for 2018.

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