Cool, calm and collected Isabella shows us the start of things to come in the Top 50 week.
Isabella and her sister Sofia present their dishes to the judges for tasting.
Isabella waits to hear if she goes into the next level.
Hugs all around as Isabella and Sofia make it through to the Top 20.
The mobile vegie garden proves to be no hassle for Isabella.
Isabella is in the lucky position of choosing the core ingredient.
During the first team challenge, Isabella looks excited at the task before her.
Feeding 100 hungry high schoolers isn't easy, but Isabella is on the case.
Ready at the canteen, Isabella and Jack prepare for the big kids' arrival.
It looks as though another core ingredient has left Isabella and Alex speechless.
Isabella concentrates on a recipe during a challenge.
Isabella runs after Jack as if to tell him a secret.
Looking confident, Isabella takes her poached pear to the judges.
Having eaten a bit too much chilli, Isabella wipes George's head.
The Tag Team Challenge saw Isabella take to the boxing ring...or is that a cooking ring?
Isabella has another go in the boxing ring to finish the job.
The Sydney Swans Challenge saw Isabella meeting some very hungry footballers.
Posing for a photo before the Sydney Swans Challenge begins.
Isabella takes some time out to talk to the cameras about what she and Lucy are cooking for the Sydney Swans.
The Flying Fish Super Challenge revealed tricky dishes to cook, but nothing Isabella couldn't handle.
Isabella gives an oyster a go. Not sure if she's enjoying it though...
It's all hands on deck as Isabella and Jack take on the Flying Fish Super Challenge.
Isabella visits her mum during the Flying Fish Super Challenge.
Isabella takes in the fact she's made it to the Top 4.
Yes Isabella - you've made it!
Showing how happy she is, Isabella is all smiles.
Jack and Sofia go to give Isabella a big hug.
Isabella tucks into a Stephanie Alexander dish.
During the Cook-A-Long, Isabella takes a break and collects her thoughts.
The thought of eating a snail doesn't look too appetising for Isabella.
It looks like snails aren't as bad as Isabella discovered.
Isabella and Jack get ready to make their marks in Junior MasterChef fame.
George and guest judge, chef Shannon Bennett find out what Isabella's cooking.
Relief sets in for Isabella and Jack who give each other a hug after their first challenge ends.
Isabella faces the judges as she presents her dish for them to taste.
Jack gives a big round of applause for Isabella as the points are announced.
That's all Isabella and Jack can do as they face their final challenge - an Adriano Zumbo creation.
Isabella listens to Adriano to find out if there's a fast forward button to making his Pear Perfections.
Making her Pear Perfections looks more perfect, Isabella adds the dusting of icing sugar.
Both Jack and Isabella look gobsmacked over something.
Having spent so much time cooking together, Isabella and Jack share the same reactions.
Isabella turns to Jack with a look that seems to have a lot of questions in it.
It's dawned on Isabella that she really is the first Junior MasterChef.
Battling with her trophy, Isabella tries to shake Matt Preston's hand.
Sofia gives her twin a hug to congratulate her on a job well done.
Isabella turns to give Jack the round of applause he deserves.
It's a big trophy, but Isabella's not scared of hoisting it up onto her shoulders.
Everyone can smile after the Junior MasterChef Finale. Congratulations Isabella.