The 52-year-old television presenter reportedly got down on one knee and popped the question to his partner Vicky Burton on the Grenadines Islands in the Caribbean last weekend - 12 months after they went public with their relationship.
A source told The Sun newspaper: "Jeremy is completely loved up with Vicky - she's put a smile back on his face.
"He chose the Grenadines because it's a very romantic place and they're ecstatically happy. Both sets of families are absolutely chuffed for them."
The couple have known each other for over a decade as Vicky was nanny to Jeremy and his ex-wife Carla Germaine's three children; Alice, 14, Ava, 12, and Henry, eight.
The 'Jeremy Kyle Show' host was married to Carla for 13 years but they split in September in 2015 and she cited his "unreasonable behaviour" for the divorce.
He then became an item with Vicky 15 months later and confirmed his new romance during an appearance on 'Loose Women' in February last year.
Jeremy said at the time: "It's a new relationship, a new chapter. I'm very happy thank you very much, let's move on with our lives."
But Jeremy's new relationship with Vicky hit a nerve with Carla and she said at the time that she was "shocked" by news because she looked after her kids for years.
She said: "I'm in shock - she was my nanny for nine years, she looked after my babies."
Jeremy was previously married to Kirsty Rowley, with whom he has 17-year-old daughter Harriet, from 1989 until 1990.