The 31-year-old presenter popped the question while he and Tia were on a romantic break in Brazil.
This week Tia took to Instagram to show of her huge ring, writing: "B I R TH D A Y S P A R K L E"
Reggie and Tia have been together for four years, and it looks like the setting for his proposal was perfect.
Tia shared a number of snaps from their holiday, and also blogged about the trip but kept quiet about Reggie asking her to marry him.
She wrote: "Where to even begin. Our time in Rio de Janeiro was spent lounging in the sun, exploring the city, taking pictures, immersing ourselves in the culture & eating plantains & steak till our top buttons had to be undone.
"Our rooftop apartment had an unobstructed view of Christo & the mountains which we, of course took great advantage of!
"I basically wore nothing but bikinis and cut offs for the duration of the trip, so don't expect anything too fancy from the fashion side of things for my Brazil posts!"
Describing how the couple spent the last day of 2014, Tia wrote: "We headed to the beach to watch the sun set over the Two Brothers – the famous mountains that overlook Ipanema."
Could that have been where Reggie got down on one knee? Either way it sounds like bliss! Congratulations to the happy couple!