The actress, 27, and her reality star husband, 28, flew from Brisbane airport to Heathrow and landed with their two children - Ella and Mia - on Wednesday afternoon.
They were joined at the airport by Jossa's fellow contestants James Haskell, Nadine Coyle and Extra Camp host Emily Atack.
Roman Kemp also posted a photograph of himself landing with his girlfriend Anne-Sophie Flury and fellow camp mate Myles Stephenson on Instagram.
Writing underneath, he said: "Just touched down in London town. Ro’s back on Capital Breakfast tomorrow from 6AM."
Jossa was crowned the winner of I'm A Celebrity on Sunday and became emotional after being handed the crown.
She beat fellow finalists Andy Whyment and Roman Kemp to the title and was greeted with a passionate hug and kiss from Osborne after she won.
Osborne then paid tribute to her with a sweet message posted on Instagram.
The Towie star posted a photograph of himsefl and Jossa, alongside the caption: "My jungle Queen!! words can not describe how proud I am of this woman!
“She absolutely smashed it from day 1 and deserves this sooo much!! Well done baby.”
According to newly-released figures from ITV, Jossa was revealed to have scooped the winning vote by a narrow margin.
She gained 50.61 per cent of final the public vote, while Whyment bagged 49.39 per cent.