The 18-year-old Keeping Up With the Kardashians star is currently in Miami, to where many celebs have flocked to attend the days-long Art Basel in America event.
Kylie couldn't be happier for Kim and can't wait to meet her new nephew, a source told E! News exclusively.
Her sisters Kourtney Kardashian and Khloe Kardashian and mother Kris Jenner had on Saturday headed to the hospital to see Kim, husband Kanye West and their new baby, who joins big sister North West, 2.
Fellow sister Kendall Jenner's whereabouts are unknown. The reality star and model, who like her family members, travels often, is seen eating food from a hotel's room service in an Instagram dubsmash video posted on Friday, which shows her acting out a scene from Scott Pilgrim vs. the World. She was spotted in New York City earlier in the week.
On Saturday, Kylie attended the Complex and Galore's Celebrate the Men and Women of Next Year party. The event featured performances from Harry Hudson from MSFTS and Jaden Smith, a longtime friend of the Kardashian and Jenner family. Kylie spent time upstairs at the bash with him and other friends Hailey Baldwin and Justine Skye.
At the bash, Kylie also cuddled an adorable dog. The reality star has two of her own at home.
The event was presented by Olio and attendees were encouraged to use the hashtag #IconOfTheBrave.
On Friday night, she, Baldwin and Skye had dinner with A$AP Rocky, another one of her friends, at a hotel, after which he and Kylie left by themselves to hang out at the rooftop bar.