Today sneakerheads around the world celebrate Air Max Day

Today is Air Max Day, a celebration of the iconic Nike running shoe, and fans around the world — including Serena Williams, Community and Girls actress Gillian Jacobs, and LeBron James — are posting pix of their sneakers online. Below, some of the best shots:

https://instagram.com/p/0s9KZVnNSr/

Celebrating air max day!

A photo posted by Mark Lewis (@lacedlewis) on Mar 26, 2015 at 12:19pm PDT

https://instagram.com/p/0s9MfMO0cx/

#airmaxday

A photo posted by Gabriel Ellenberg (@gaberoyale) on Mar 26, 2015 at 12:20pm PDT