The duo partied at a massive NYE soiree, where they counted down to the new year with the crowd, donned 2018 glasses and danced the night away. Khloe made sure to take plenty of snaps of Tristan's snazzy outfit, even writing, "He's sooooo handsome," over one video of the NBA pro showing off his moves.
Tristan was just as into his lady, telling Khloe in one of his Snapchat videos, “For six months [pregnant], you a fine six months, baby. I’ll tell you that.”
Both of the parents-to-be also captured plenty of their PDA as well. In fact, they got so involved in one makeout sesh, she didn't seem to realize the camera was just on half of her boyfriend's head, but Tristan took a video as they cuddled up on a shuttle after the party.
Luckily, the loved-up duo got a clear pic of their first kiss of 2018.
The Good American designer's look for the night was uber-glam: a head of big blonde curls, a brown smoky eye, and flirty pink pout, which she rocked with a sheer black mini by House of CB that featured spaghetti straps and gathered mesh detailing.
Khloe is clearly in love -- the California girl spent time in very snowy, record freezing temps to ring in 2018 with her man!
Before the couple's NYE celebrations, Khloe shared her top nine photos to Instagram alongside a lengthy caption looking forward to the new year.
"2017 you've been good to me but I can NOT wait for 2018!!" she wrote. "Honor the past year by celebrating your joys, mourning your losses, and shaking your head at the wonder of it all! We, as people, tend to spend a lot of time and attention watering the weeds. And then, we’re growing the weeds rather than watering the flowers and rejoicing! I have worked hard on being a positive person.
"I want to reflect and be grateful for all of the beauty that I have experienced this past year. We all have drama in our lives so let's rejoice in the positives and not dwell on the negatives. This past year has been full of love, blessings and happiness!" she added. "Lord knows I'm grateful for the place I am in in my life! I tell Him daily but I can not begin to explain my excitement for everything new in 2018!! Nerves and anxiety are an underestimate. I'm thankful to have a beautiful support system in place to help me celebrate New chapters! New experiences! New beginnings! I'm trusting the magic of NEW this 2018!"