She's famous for her toned and fit physique and has authored multiple workout books.

But on Thursday night, Elsa Pataky proved that she isn't all about green juices and gym workouts.

The 41-year-old actress and wife of Chris Hemsworth took to her Instagram Story to share a short video of her decadent chocolate dessert.

'Who says girls don't eat sweets?' Elsa Pataky, 42, trades her usual green juice with olive oil for a decadent chocolate dessert after revealing the secrets behind her age-defying figure

Night out! She indulged at the opening of Fendi's flagship store in Melbourne (pictured)

She captioned the clip, which was shot at the opening of Fendi's flagship store in Melbourne: 'Who says girls don't eat sweets?'

The sweet treat appears to have come at the end of a lavish dinner held at the launch of the Italian brand's latest venue, to which she donned a striking ensemble worth an eye-watering $10,000.

Elsa may enjoy some cake, but she usually consumes slightly less indulgent foods.

Fit! Elsa may enjoy some cake, but she usually consumes slightly less indulgent foods. The actress credits her age-defying bikini body to training with weights, drinking green juices and always making time for yoga

What a mix: When it comes to her diet, Elsa told OK! Magazine in 2016 she swears by a healthy green juice containing apple, celery, carrot, lemon and olive oil

The actress credits her age-defying bikini body to training with weights, drinking green juices and always making time for yoga - even if it is just before bed.

Yoga is also a major part of Elsa's fitness routine, with the Spanish actress explaining that the mat-based exercise is 'great for toning your booty'.

The 12 Strong star will usually end her day with a yoga routine or some more strenuous exercise.

With a passion for fitness since she was a teenager, Elsa also enjoys surfing, strength and weights training and prefers to have a toned, muscular physique.

Active: With a passion for fitness since she was a teenager, Elsa also enjoys surfing, strength and weights training and prefers to have a toned, muscular physique

Hard work: Yoga is also a major part of Elsa's fitness routine, with the Spanish actress explaining that the mat-based exercise is 'great for toning your booty'

Toned: 'I always admire sports bodies in women – that athletic look,' she told Women's Health back in 2016. Elsa is pictured with her children

'I always admire sports bodies in women – that athletic look,' she told Women's Health back in 2016.

When it comes to her diet, Elsa told OK! Magazine in 2016 she swears by a healthy green juice containing apple, celery, carrot, lemon and olive oil.

Elsa lives in Byron Bay, a coastal town in New South Wales, with husband Chris Hemsworth and their three children, five-year-old India Rose and twin sons Tristan and Sasha, four.