The World of Dance judge has been posting (ridiculously cute) Instagrams of his girlfriend Hayley Erbert a lot lately, so people-including his fellow WoD judge J.Lo -are dying to know whats going on between these two.

On Valentines Day, Derek posted this simple but meaningful post:

View this post on Instagram I love this woman #valentines A post shared by Derek Hough (@derekhough) on Feb 14, 2019 at 8:59am PST

Clearly, their relationship is serious (on top of being seriously adorable). But before you start wondering about any wedding bells, you're probably wondering who is this Hayley- and how did she dance her way into Derek's heart?

Heres what you need to know about Derek Hough's girlfriend:

They met on Dancing With The Stars.

ICYMI, Derek was a dancer on DWTS for years before joining the WoD fam. That's where he met Hayley, a troupe dancer with the show. The two even danced to Ed Sheerans "Thinking Out Loud" on DWTS Live in 2015.

Hayley also shared a #tbt Instagram post in May 2017 that showed her and Derek onstage, looking all steamy together. "Cant believe this was 3 years ago," she wrote. So clearly, theyve had chemistry for eons.

View this post on Instagram Can't believe this was 3 years ago #TBT A post shared by Hayley Erbert (@hayley.erbert) on May 4, 2017 at 4:59pm PDT

Its hard to say exactly when they started dating.

Despite all those fireworks, the two didnt actually start dating until 2016, according to Closer Weekly . But others say they started dating as early as 2015 (which, tbh, does make sense with Hayley's Insta).

View this post on Instagram Happy 4th of July A post shared by Derek Hough (@derekhough) on Jul 4, 2018 at 6:00pm PDT

Derek and his sister Julianne helped launch Hayleys career.

Hayley was hired to go on a Move Live tour with Derek and Julianne Hough in 2014. And while she was performing, she caught the eye of a producer for DWTS who recruited her for the reality competition show, Heavy reports.

They love spending the holidays together.

Hayley shared an Instagram of herself and Derek-in matching PJs, no less-celebrating Christmas together in 2018. (Derek's WoD costar J.Lo and boyfriend A-Rod posted a similar holiday pic, too). In the pic, the two jokingly pose with a cat in front of a fire, and its all kinds of adorable.

View this post on Instagram Merry Christmas, everyone! A post shared by Hayley Erbert (@hayley.erbert) on Dec 25, 2018 at 10:45am PST

Hayley is a huge fan of a certain Canadian singer.

Sorry, Beliebers, but it's not Justin. Last year, Hayley admitted on Instagram that shes obsessed with Celine Dion, sharing this hilarious video of herself and Derek rocking out to "Its All Coming Back to Me." If that isnt love

View this post on Instagram For those of you who dont already know, I am OBSESSED with Celine Dion. Growing up, I listened to her CDs on repeat (in my Walkman ). I also danced to just about every single song of hers, thanks @missjonjon! Still to this day, I play her albums on repeat. And now I make @derekhough jam in the car with me! Celine is QUEEN, forever and always @celinedion P.S. The craziest thing is, I still have yet to see her live! Im making it happen by the end of this year. A post shared by Hayley Erbert (@hayley.erbert) on Aug 4, 2018 at 11:04am PDT

They support each other's work.

While Derek left DWTS a few years ago, he's "still paying close attention" to the show to support Hayley, and Hayley's also attended some World of Dance tapings to support him, according to ET .

And then Derek recently shared this

View this post on Instagram Just gonna put this right here @hayley.erbert A post shared by Derek Hough (@derekhough) on Jan 30, 2019 at 5:05pm PST

Nuff said, right?

Hayley takes the lead in the kitchen.

Derek's Instagram is filled with videos of Hayley cooking (most likely ridiculously nutritious meals to fuel all that dancing). In one particularly sweet vid, he serenaded Hayley with "Shallow" from A Star Is Born while she was busy in the kitchen:

View this post on Instagram Started out as a serenade in the kitchen. Turned into a full video. What did you think of it? Link in Bio A post shared by Derek Hough (@derekhough) on Jan 24, 2019 at 11:08am PST

And then there's this:

View this post on Instagram Zesting that Lime #pungent A post shared by Derek Hough (@derekhough) on Nov 15, 2018 at 11:00pm PST

Theyre so in love its ridiculous.

Derek has repeatedly said on Instagram how much he loves his gf. And when she was in a bus crash on DWTS Live, he Instagrammed a photo of the two of them from his sisters wedding and wrote, "Im so thankful my love is safe."

Hayley's a Libra.

Born on October 11, Hayley's a total Libra. And since Derek's birthday is May 17, that makes him a Taurus. While their zodiac signs aren't perfectly compatible , Libras and Tauruses are the best match in the bedroom.

Not that it really matters-Derek loves Hayley no matter what. In a sweet birthday Insta, he wrote, "Happy birthday to my love. You fill my heart with so much joy. I love our crazy adventures together or just sitting on the couch with our bodies entangled watching a movie." Awwww.

View this post on Instagram Happy Birthday to my love. You fill my heart with so much joy. I love our crazy adventures together or just sitting on the couch with our bodies entangled watching a movie. I find myself smiling at you in random moments. Fully feeling the effect youve made in my life. This surprising journey fills my heart with so much gratitude. Today I celebrate and am truly thankful you were born. Happy Birthday @hayley.erbert A post shared by Derek Hough (@derekhough) on Oct 11, 2018 at 11:33am PDT

People really, really want them to get engaged.

Like, a lot. After Julianne got married, E! asked Derek if he might be next. "It's not something we really talk about so much right now," he said. "It was a wonderful week to be with [Hayley] and experience love." Still, he added, "I don't want to be an old grandpa when I start having kids... After that wedding, I'm like, Who knows?' You feel the love."

Ryan Seacrest also straight-up asked Derek in July 2018 if he thinks about getting engaged, and Derek had this to say: "Yeah, sometimes. Sometimes. But you know whats funny? Theres so many people getting engaged and married in my circle [right now], and Im just letting them enjoy that, so my time will come. Well see when it happens."

Oh, and J.Lo's apparently been wondering when he's gonna pop the question, too.

On the set of World of Dance, Derek made a "dad joke," and J.Lo told him shed thought hed be a good dad someday. "And then she said, 'So, why arent you [a dad]? And why arent you married?' Im like, 'Oh god!'" he recalled in the above video.

Then, she apparently asked Derek, "Well, do you want to get married?" And he said, "Well, yeah, I think I do." To which she responded (in classic J.Lo no BS fashion), "Oh, you think you do? Youre one of those?" Derek explained, "I was like, 'Well, hold on! Let me finish'

Okay, Derek, imma let you finish, but only if you keep posting more adorable Instagrams of Hayley in the meantime.

View this post on Instagram Loving you is my favorite part of every day Happy Valentines Day, baby! A post shared by Hayley Erbert (@hayley.erbert) on Feb 14, 2019 at 10:31am PST