North West and Saint West

Kim Kardashian shared this sweet pic of daughter North West, 2, and newborn son Saint West holding hands. Quoting North, the reality star captioned the snap with, “He’s my best friend.”

Kelly Osbourne and Jack Osbourne

The former “Fashion Police” star posted this photo of herself and her brother Jack, with the caption “#Twins?” Kinda looks like it, no? 

Gisele Bundchen and sisters Raquel, Patricia, Rafaela, Graziela, and Gabriela

On National Women’s day, the Brazilian supermodel posted this photo of herself and her six sisters. “Happy women’s day!” she wrote. “To all women of the world of all shades and colours. Let’s embrace our uniqueness, our strength, our sensitivity, all that we are…#womenpower #onelove #sisters #somuchlove#gratitude.” 

Jessica Simpson and Ashlee Simpson

The sisters took this selfie while out and about. Awwwww.

 

A photo posted by Paris Hilton (@parishilton) on

Paris Hilton and Nicky Hilton

The famous fashionistas took this selfie while hanging out in New York.

 

A photo posted by Mark Wahlberg (@markwahlberg) on

Mark Wahlberg and Donnie Wahlberg

Mark captioned his photo (with brother Donnie) with a simple “#family.”  Enough said.

 

A photo posted by Julianne Hough (@juleshough) on

Julianne Hough and Derek Hough

Julianne posted this photo, with the caption “#tbt to last summer during MOVE Live on Tour! Haha I loved this moment during “Anything You Can Do I Can Do Better” very fitting for the two of us! “

Mary Kate Olsen and Ashley Olsen

The twin child stars-turned-fashion designers posted this photo without a caption, proving that when it comes to sisters, sometimes you don’t have to say a word.