The 20-year-old model has seemingly been accepted by the Kardashian/Jenner clan as she was welcomed into the fold on the luxury skiing trip to Aspen, Colorado.
The group reportedly plan to celebrate New Year's Eve together there, according to E! News.
"It is ice cold out here, people," Sofia said on her Instagram Stories in a video showing her with Kardashian family friend, and her sister Nicole Richie's old "The Simple Life" co-star, Paris Hilton. "We are on a ski lift and she seems to act like we're in California."
An eyewitness told E! News that the famous family happily stopped to say hello to waiting fans.
"Scott, Sofia and Kourtney hung out together and were talking a lot," they added. "Kim and Kanye walked around separately. Everyone seemed happy and relaxed. Kanye was smiling with a huge grin and talking to the fans who had gathered outside to catch a glimpse of the group. They were all very nice and happy to say hi to fans."
Scott and Kourtney, who share children Mason, Penelope and Reign, and Sofia also recently took a trip to Cabo San Lucas.
While Sofia has been sharing clips of her skiing on Instagram, Kendall posted a series of saucy snaps.
Posing in just a bikini, sunglasses, furry hat and boots in the deep snow, the model captioned one image, "F**k its cold."