Celebrity The Kardashian-Jenners Remember the Late Robert Kardashian on His Birthday By Kelsey Glein Kelsey Glein Twitter Kelsey Glein is a Seattle-based writer and editor who covers all things fashion, beauty, and pop culture. She was previously the Digital Editor of InStyle and is currently a Social Media Manager at a cosmetics company. InStyle's editorial guidelines Updated on February 22, 2016 @ 02:15PM Pin Share Tweet Email Photo: kourtneykardash/instagram It's a big day for the Kardashian-Jenner clan—not only did Kim Kardashian West release the first photo of her and Kanye West's son Saint West, but she also paid tribute to her late father Robert Kardashian on what would've been his 72nd birthday. "Happy Birthday dad! So much has gone on in our lives since you've been gone, and I know you have been my guardian angel seeing it all unfold! I love you and miss you so much!," the star captioned an Instagram snap of her dad (below). So sweet. But she wasn't the only family member to take to social media with some emotional words. Each of her sisters—Kourtney, Khloé, Kendall, and Kylie—'grammed a photo and message as well. Check them all out below. Saint West's First Baby Picture Is More Adorable Than We Imagined