The duo confirmed the sad news through their joint manager, Georgina Harrop.
"'After 18 months together, Sam Frost and Sasha Mielczarek have come to a mutual decision to end their relationship," she told the Courier Mail in a statement.
The pair have faced split allegations for months, but both Sam and Sasha are adamant there are no hard feelings.
"It is important to stress that there is no bitterness or scandal, they have just come to the realisation that the best way forward is to separate."
"They wholeheartedly respect and cherish the friendship they have for one another which will continue moving forward," the statement continued.
"They wish to thank everyone for their love and support over the past 18 months."
The 34-year-old construction worker has since commented on the sad demise of his relationship.
Taking to Instagram he penned a heartfelt post about his former love.
"After 18 months together, I can confirm that Sam and myself have come to a mutual decision to part ways. I respect Sam wholeheartedly and cherish our new found friendship," Sasha mused.
"It is important to stress that there is no bitterness or scandal however the distance has been challenging at times. This is a very difficult time for the two of us and to be honest I'm absolutely heartbroken," he said passionately, before focusing on Sam.
"Sammy, I think you are absolutely amazing, beautiful in every way and I wish you all the best in the future. I will be listening to your fantastic radio show and look forward to you killing the ratings in 2017," he wrote alongside an image of them in happier times.
Sasha then took a moment to thank the public for their support.
"I want to thank everyone for their love and support over the past 18 months, you have all been amazing! Now get back to your holidays and enjoy time with family and friends! #chinup #timehealsallwounds."
The news follows Sam's cryptic Instagram post that alluded to trouble in paradise.
The bubbly blonde recently penned, "Christmas isn't always sunshine and rainbows for everyone.. I'm sending nothing but good vibes, love, light & happiness • I promise 2017 is going to be YOUR year ✨💛 xxxx"
Sam met Sasha on reality show, The Bachelorette.
While the 27-year-old was based in Sydney for her radio show, Sasha is based in NSW's South Coast for his construction job.
Sam's road to love has been fraught with drama after she suffered a very public break-up in 2014 following her appearance on The Bachelor.
The radio star famously won Blake Garvey's heart, before he dumped her for second runner-up Louise Pillidge.