Gina Stewart. (Courtesy/Instagram)

An age-defying model dubbed the 'world's hottest gran' has revealed some of the secrets to her youthful looks. Gina Stewart constantly wows fans with her baby face and leaves people in disbelief when she tells them she a 50-year-old granny.

Many also beg her to tell them how she looks younger than her age. Gina said as well as eating healthily she looks after her mind as it is equally important.

She told the Daily Star: “I truly believe in the power of mind over matter. A good hack is having peace of mind, being aware of what stresses me and reducing that stress as much as possible. If I get overwhelmed or stressed I create a peaceful space within myself and re-charge."

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Gina, who has almost 300,000 followers on Instagram, added: "I definitely believe in the power of positive thinking and reducing or eliminating negativity.”

The glamorous gran goes walking regularly, drinks plenty of water and tries to stick to a healthy diet to maintain her envious looks.  She lives in the Gold Coast in Australia which aides her age-defying mission.

She said: “I live near the beach and love to go for barefoot beach walks daily. Ten thousand steps a day is important and helps me feel good mentally. I also always drink plenty of water and eat antioxidants. Blueberries are my go to fruit.”

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Gina, who celebrated her 50th birthday partying at a lavish resort, also keeps an eye on her portion sizes.

Gina continued: “I have eliminated all gluten from my diet and feel so much better having small meals with basic healthy foods.

“I believe you are what you eat, feel and think. All of it is feeding yourself on every level every day. Consistently all that is beneficial for a vibrant, healthy life.”