Irena shared the same official snap, and gushed about her new man.
"I got the man of my dreams and I couldn’t be happier. I love you so much @locklangilbert," the nurse wrote in her caption.
The couple also shared a candid video thanking fans for their love and support and revealing how excited they are to go public with their love.
"I guess for starters we just want to say a big thank you to everyone for watching, it's been a crazy year but we're definitely happy," Locky began before the couple admitted they were slowly making their way through all of the messages they'd received.
"So excited for the future, I can't wait for us to start living our life together finally," Irena added. "It's been such a long process and now we finally get to be together and finally get to start our life together."
"It's been so long and we've had all these plans and it's been delayed and delayed and delayed but now we finally get to tell everyone that we're in love and get on with our normal life," Locky explained.
In the video, Locky and Irena also shared what they'll be doing first off now that they don't have to hide away from the public.
"First thing that we're going to do - just be with each other in the outdoors, just normal, go for a hike, go for a camp, just anywhere out in nature because I think that's where we're both happy.
"Little road trip, phones switched off," a grinning Irena chimed in.
The couple then signed off with a sweet kiss - so it looks like they're the real deal.
It's not a total surprise that Locky and his leading lady are still together - as the news was confirmed ahead of the finale by Ten themselves.
“Locky and his chosen lady are still together and very happy,” a spokeswoman told The Daily Telegraph a week before the news became official.
The Bachelor himself even revealed a sweet insight into his and Irena's secret relationship back in August when the show was about to premiere."It's an amazing feeling – I don't think I've felt love like this before. I wake every morning and the love is stronger and stronger, I can see so far into the future [with her]," said at the time.
Locky professed his love for new girlfriend Irena in an emotional grand finale that saw him make the agonising choice between her and runner-up Bella Varelis.