They announced the news with this beautiful photo, which they both posted on Instagram with the respective captions "I said yes" and "she said yes".
And OBVIOUSLY fans couldn't be happier about the news.
But some people have a few questions.
Like, how is Joe Jonas engaged when he's been my true soulmate since 2008?
THE PUFF PAINT NEVER LIES.
Of course, there were plenty of Camp Rock jokes too.
But it wasn't just Jonas Brothers stans making jokes. The Game of Thrones fans came out in force too.
This person noticed that Joe bears more than a slight resemblance to a certain GoT character...
And, since the new season is already being delayed thanks to Kit Harington and Rose Leslie's wedding, there were some questions about this new development.
But at least Sansa has finally found a decent guy to settle down with.
In fact, they've both pretty much won the relationship lottery.