Almost instantly, fans shared their excitement in the comments.
"There’s a keeper!" exclaimed Jason's controversial co-star Bryce Ruthven.
"Awe...... love you guys," penned fellow season eight groom James Susler.
KC shared her own post from the weekend's fun activities.
On Sunday, the couple also shared footage of themselves hanging out with Jason's nieces.
Not only did the girls wear clothes from KC's clothing line, but they also practised TikTok routines together.
"Well I'm now invisible," Jason joked as he filmed the girls and KC watch videos.
She's certainly a hit with the family!
KC and Jason first fuelled rumours that they were dating when they shared photos of each other to their Instagram Stories in May.
Whilst Jason shared a sweet selfie of the two with the romantic lyrics of Justin Bieber's Intentions playing over the top, KC shared some candid videos and photos with Jason's back to the camera.
Not only that, but eagle-eyed fans spotted flirty messages left on each other's Instagram comments.
In one, Jason commented "Oh my lord," on a selfie uploaded by his rumoured new lady who replied "Oh stop you".
Jason replied to one of KC's post: "Oh that’s it I’m sliding into your dms!" followed by a fire emoji.
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