By Kelsey Glein
Updated Jun 21, 2016 @ 7:45 pm
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Credit: zacefron/Instagram

File this under holidays that probably don't need to exist. Today is National Selfie Day—yes, you read that correctly—and celebrities took to Instagram to mark the occasion. Everyone from Kris Jenner to Jared Leto both intentionally and unintentionally celebrated on social media, posting selfies ranging from the serious to the hilarious.

One of our favorites? Zac Efron's snap, where the hottie poses alongside pals Adam Devine, Aubrey Plaza, and Sugar Lyn Beard, his co-stars in the upcoming movie Mike and Dave Need Wedding Dates. "What? National Selfie Day?! alright... :) #mikeanddaveneedweddingdates #adventures #july8," the actor captioned the 'gram, also using the holiday to plug their film.

Check out more of the best #NationalSelfieDay 'grams below.

Taylor Lautner:

Kris Jenner:

Sarah Michelle Gellar:

Zendaya:

Kesha:

Jared Leto:

Justin Bieber:

Gina Rodriguez:

Bella Hadid:

Zac Efron:

Emilia Clarke:

Elizabeth Hurley: