Tebow, a former star at Nease High School, has reportedly been seeing Nel-Peters for about two years.
Tebow and the 2017 Miss Universe victor first confirmed their relationship in July.
Heading down the aisle!
Nel-Peters, 23, also shared an emotional post about her future groom, writing, "Any dreams I've ever had, you've exceeded them all!" She now lives in New York- and she's fluent in both English and Afrikaans. South African singer Matthew Mole stepped out from behind a hay bale and serenaded the couple with The Wedding Song, one of their favorite songs.More news: Samsung confirms foldable phone release for the first half of 2019
Tim had secretly flown Demi-Leigh's family over from South Africa to be there for the special moment. Family and friends joined the couple immediately after to celebrate.
"You represented Miss. Universe so well!" he wrote.
Dishing on the proposal to PEOPLE, Tim revealed he wasn't nervous. "I was excited", he said.
"I actually wasn't really nervous", Tebow said. "I'm sorry you didn't get a new truck", she said, "but you're getting a new daughter!" I have so many things I want.
Tebow, a devout Christian, has long planned to remain a virgin until marriage. I want to have kids.More news: Man licks doorbell for three hours in CCTV
Tebow wanted to make sure every detail was flawless - and he went through great lengths to surprise Nel-Peters.
'I'm just looking for someone who has a good heart, ' he explained. "They have to be kind, and they have to care about people who can't do anything for them in return".
(CBS4) - Former Broncos quarterback Tim Tebow has gotten engaged.
Over parts of three National Football League seasons, Tebow earned about $9.6 million.
The 2007 Heisman Trophy victor is now a member of the Binghamton Rumble Ponies, the New York Mets' AA team.More news: FDA warns of possible chocolate, caramel candy hepatitis A contamination
Tebow is expected to start this season with the Mets' Triple-A affiliate in Syracuse.
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