Turning six is a special occasion for any child.

And on Friday, Guy and Jules Sebastian threw a superhero-themed birthday party for their son Archie at their $3.1million Sydney mansion.

And while they couldn't have any guests at the bash due to the coronavirus lockdown, the couple pulled out all the stops to 'make it memorable' for their boy, including costume dress ups and a lavish cake.

Going all out! Guy and Jules Sebastian threw a superhero party for son Archie (right) at their $3.1M mansion on Friday... complete with elaborate costumes and a lavish cake

Jules and Guy dressed up for the party, wearing matching Batman and Batgirl outfits.

Birthday boy Archie looked adorable dressed as the Hulk.

His older brother Hudson, eight, wore a blue and red Captain America costume.

Time to celebrate: The party included an elaborate cake which is a replica of Captain America's shield, with Thor's infamous hammer on the side and the Hulk's fist

In a video Jules shared to her Instagram story, Archie is seen having a ball and blowing out the candles on his elaborate cake, which was a replica of Captain America's shield.

Decor included red and blue balloons and a life-sized Spider-Man, with Jules sharing a number of images online with fans.

Adding to the fun was a pinata, party hats and poppers filled with streamers.

What fun! Decor included red and blue balloons and a life-sized Spider-Man balloon while they also celebrated with a pinata, party hats and poppers filled with streamers

'You never forget your first school birthday party. Inviting all your new friends over, party food, lollies and of course a cake!' Jules captioned the sweet images.

'Our sweet little boy Archie turned 6 today and it was our mission in lieu of his planned party to make it a day to remember. Running with the superhero theme, today was nothing short of amazing,' she added.

The stylist then finished with a sweet tribute to her gorgeous son.

'It was our mission to make it a day to remember': Jules revealed she planned the elaborate party for Archie (pictured) as he wasn't able to celebrate with friends during the coronavirus pandemic

'Made even more amazing by realising just how resilient our little boy is. Happy Birthday Archie, we love you more than life itself!'

Guy and Jules are currently in lockdown with their children at their $3.1 million Maroubra property in Sydney.

The 'fortress' as it was once described by neighbours, boasts it's own tennis court and pool, offering the family hours of fun as they remain home for the foreseeable future.