North West and Penelope Disick are already two of Hollywood's most popular sidekicks—and they aren't even in the 2nd grade yet! Check out some of their most cutest moments together.
Kim Kardashian shared this adorable photo of North reaching out to her older cousin as the two headed to bed.
Do you want to build a snowman? North and Penelope dressed up as Elsa and Anna from Frozen for Halloween.
Penelope looked a lot less frightened than North did while they were "road trippin'" alongside Kim, Khloe, and Mason.
Check out these little mermaids!
North and Penelope love their ballerina outfits! The two besties rocked their dance gear on Penelope's birthday.
BFF goals. How cute does North look holding P?
Real friends get injured together and smile about it!
Kim shouted P out for her birthday in the sweet throwback picture, saying in part, "tbt thanks for being the best big cousin North always looks up to!"
The two youngsters checked out a winter wonderland together.