The Vine star singer has been leaving adorable comments all over Millie's social media posts, while also tweeting about a crush he has right now.
Millie actually liked one of Jacob’s tweets that reads, "just another day w you on my mind," which has fans thinking that it was actually about her.
He also commented “Of course” on her recent Instagram post showing her with a teddy bear gift, which she captioned, "Thanks for the bear❤️," making fans believe that he bought it for her.
Most fans are obsessed with this new pairing, commenting things like "Aww♥️♥️♥️♥️♥️," and "Jacob Sartorius sent Millie Bobby Brown a stuffed animal bear... oh what’s that? the beginning of the greatest love story of all time? i think Yes."
However other fans aren't too keen on this new rumoured couple at all, thinking that Millie is "too good" for Jacob.
Of course, nothing at all has been confirmed by either Millie or Jacob, so best take this news with a grain of salt.