Celebrity Celebrity Moms Get a Closer Look at Kim Kardashian West and North's Mommy-and-Me Mermaid Style By Brandi Fowler Brandi Fowler Instagram Website In addition to her extensive fashion, lifestyle, and beauty coverage for InStyle, Brandi has worked as a writer and editor for E! Online, a fashion and lifestyle writer for Hello! US, an editor/on-camera host for AOL, contributing writer and red carpet correspondent for Variety and Cosmopolitan, and has also served as the Hollywood correspondent for Australia's 9News' TheFIX. Her editorial features can also be found on Vitruvi, MTV News, Madame Noire, Hello Beautiful and more covering fashion, beauty, lifestyle, travel, and entertainment news. Her articles have been syndicated by the likes of Health, Marie Claire, Essence, Shape, Yahoo!, People, and more. InStyle's editorial guidelines Updated on June 23, 2016 @ 08:00PM Pin Share Tweet Email Photo: Courtesy Kim Kardashian West North West had one epic third birthday party, and on the heels of her mermaid-themed bash with bestie Penelope Disick, her mom Kim Kardashian West showed off a full-length shot of their mommy-and-me mermaid moment. In the snap that the Keeping Up with the Kardashians star shared on her website Thursday, North flashes a big smile as she holds on to her mom's hand, rocking French braids, a shell halter top and a glitzy pink mermaid skirt. Kim stands by her side in a mermaid-style, shimmery green dress complete with a shell halter top and green tulle at the bottom. If Kim's dress looks familiar, there's a reason. It's actually a throwback costume that Kim wore on Halloween a few years ago. The Kardashians Threw an Amazing Mermaid Party for North and Penelope—See the Photos! "North and P had a joint mermaid party over the weekend!," Kim captioned the snap. "They are obsessed with mermaids, so we gave the party a fun 'Under the Sea' theme. Thought you guys might want to see more pics from the occasion!" She continued, "How cute is this mermaid costume North had on?! I had to bring out my 2012 Halloween costume, when I was a mermaid. I can't believe it still fit! North was in awe, and I knew I would get major "cool mom" points for wearing this." Kim, Khloé Kardashian, Kylie Jenner, and Kris Jenner all posted aww-inducing photos and Snapchat stories of the party while they were there, and Kris even shared a shot of Kim and North's costumes from the back as well on Thursday." In love with these pics from North and Penelope's mermaid-themed birthday party!!!," she wrote alongside it. Beyond adorable.