'One of a kind': The Bachelorette star Jillian Harris receives stunning oval cut engagement ring designed by fiance Justin Pasutto

Jillian Harris announced her engagement to boyfriend Justin Pasutto with a sweet Instagram snapshot on Christmas morning.

The Bachelor alum - who also starred as The Bachelorette - received an exquisite oval-cut diamond that was specifically 'handcrafted for Jillian and is one of a kind.'

The host of Love It Or List It Vancouver on HGTV was proposed to by her longtime love with a 'yellow-gold, micro-claw-set diamond band with the oval-cut diamond set in a four-prong setting,' by Crestina Minichiello of Minichiello Jewellers.

'Happiest girl in the world!': Jillian Harris announced her engagement to Justin Pasutto with a sweet Instagram snapshot on Christmas morning with their baby Leo

Pasutto, a former pro snowboarder, 'handpicked' and 'designed' the engagement ring with the Vancouver-based jeweller, they told UsWeekly.

Harris - who turns 37 on Friday - shared the exciting news with her fans in a photo of herself, Pasutto, their baby Leo, four months, and their dogs all in bed enjoying the Yuletide celebration at the Opus Hotel in Vancouver, decked out in seasonal pajamas. 

In the snapshot, the brunette beauty's hand was positioned in a way that revealed her stunning engagement ring.

'One of a kind': The exquisite oval-cut diamond was 'designed' by Pasutto with the help of Crestina Minichiello of Minichiello Jewellers

She wrote: 'Well THAT was SOME Christmas morning!!!!! OH MY GOD my heart cannot handle this much LOVE! you've made me the HAPPIEST girl in the world!'

Harris added emojis of a ring, a heart, and hashtags, '#Finally #ISimplyAskedForOneThingForChristmas.' 

Pasutto - who's been dating the reality star for four years - also posted the shot, adding in on his page, 'Merry Christmas from the Pasutto’s! …. At least soon to be.' 

On Monday, the mother-of-one took to social media and posted another image as she showed off her bling once more.

'Perfect Christmas': On Monday, the host of Love It Or List It Vancouver on HGTV took to social media and posted another image as she showed off her bling once more

'Thank you for a perfect Christmas Santa... ps do you see what I see?' she asked followers while holding up her hand flashing the bling in the picturesque winter wonderland snap. 

Harris, who is eight years older than her fiance, opened up in March on her blog about the age difference between the two as she revealed to the world her pregnancy with baby Leo, who she gave birth to August 5.

She wrote: 'I was 32 when we met, and Justin was a fresh ripe 24. BTW I SWEAR he told me he was 27, which I rounded up to 28… so in my mind we were basically the same age HAHA.'   

Baby's first Christmas: The husband and wife-to-be took four-month-old Leo for his first photo with Santa this year

Happy home: Jillian shared this Christmas eve shot of the gorgeous couple on their holiday journeys

Harris noted that the 'age difference was never really an issue' for either party, as their 'love was always strong and very real and that’s all that mattered.'

So strong and real, according to Harris, that she 'could have gotten knocked up with his baby on that second date and [she] probably would have been over the moon,' adding she 'WAS smitten' 

The interior designer made quite a mark on season 13 of ABC's Bachelor in 2009, where she vied for the attention of Jason Mesnick. She did not win, but placed third.

On The Bachelorette - which aired in mid 2009 - she chose Ed Swiderski and they became engaged, but broke up in 2010 after reports surfaced that he had been partying too much. 

We found love: Harris and Pasutto appeared on The Bachelor At 20: A Celebration of Love this past February

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