Kardashians Celebrate North West & Penelope Disick's Birthdays With Mermaid-Themed Joint Party
Kardashians Celebrate North and Penelope's Birthdays With Amazin…
‘Paw Patrol: The Mighty Movie’: Hear North West Make Her Acting …
Why Scott Disick’s Keeping His Distance From Ex Kourtney Kardash…
Khloé Kardashian Is 'Not OK' on Daughter True's First Day of Kin…
Kourtney Kardashian Thanks Doctors for 'Saving' Her Baby With 'U…
Kim Kardashian Acting Performances Before 'American Horror Story…
How Chris Appleton Convinced Kim Kardashian to Officiate His Wed…
Kourtney Kardashian and Travis Barker Leave Hospital After 'Urge…
Kim Kardashian Clutches Tequila Bottle as She Wipes Out on Wakeb…
Kim Kardashian Is Unrecognizable With a Buzzcut and Barely-There…
Kim Kardashian 'Hanging Out' With Odell Beckham Jr. and Open to …
Prince Harry and Meghan Markle Show Off PDA and Dance at Beyoncé…
Inside the Kardashians' Night Out at Beyoncé's Concert: Fashion,…
Kylie Jenner and Timothée Chalamet Make First Public Appearance …
Lil' Kim Calls Magazine Cover Retouch Job 'Sabotage'
Kim Kardashian Sports Bangs at Star-Studded Charity Event
Khloé Kardashian Supports Remi Bader Amid Influencer’s Struggle …
Landon Barker Punches a Guy for Girlfirend Charli D'Amelio in Ne…
Tori Kelly on Her 'Emotional' Return to the Stage and Deluxe EP …
Happy birthday, North West and Penelope Disick!
The Kardashian-Jenner family celebrated North and Penelope's birthdays -- Kim Kardashian and Kanye West's daughter turned three on June 15, while Kourtney Kardashian and Scott Disick's little girl will turn four on July 8-- going all out on Saturday in the girls' favorite theme: mermaids!
WATCH: North West Celebrates Her Third Birthday as a Princess at Disneyland
The cute cousins looked adorable in matching mermaid costumes at the party, which included pool toys, princesses and two cakes. Much of the family was decked out in mermaid gear as well, and, of course, they shared pics of the whole thing on social media.
Kylie Jenner kicked things off, giving us a peek at the party's decorations via Snapchat.
The Kylie Lip Kit creator then documented North enjoying some princess time before getting in on the action herself.
Kylie, 18, even snapped a pic with the birthday girls and their beloved Disney princesses.
Khloe Kardashian had fun hanging out with Jenner and Scott Disick outside, showing off her pink wig on Snapchat. "This is how Scott and I spend our Saturdays," Khloe told her followers. "Becky with the pink hair." The 31-year-old reality star later revealed on her Instagram that her hair color was a request from North and Penelope.
"Normally it's Kylie in a wig!" Khloe joked in another snap.
Once the cake was ready, it was all about the Penelope and North.
Kanye and Kim (dressed in her 2014 mermaid Halloween costume) looked on as North prepared to blow out her candles.
NEWS: Kanye West is Nothing But Smiles in Sweet Snapchat Video With a Young Fan at Disneyland
Meanwhile, Penelope was all about posing for the camera.
The famous family ended the day with adorable snaps of Penelope, North, and Penelope's big brother, 6-year-old Mason, all posing with Aunt Khloe.
MORE: North West Gives Kim Kardashian the Sassiest Side-Eye Ever
We just can't believe North and Penelope are another year older -- they're growing up so fast! Check out North's seven most adorable moments of the past year in the video below.