Happy National Underwear Day, Guys!

To celebrate this glorious annual event – yes, it really is a thing – we’ve scoured the internet for some of the hottest celebrities posing in their favourite underwear.

So whether your a boxer, brief, or jockstrap – we’re looking at you Zac Efron – kinda guy, there’s something here for everyone. Enjoy!

Justin Bieber

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#mycalvins

A post shared by Justin Bieber (@justinbieber) on May 27, 2016 at 7:59pm PDT

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Back in bed with @justinbieber. Introducing the Spring 2016 Calvin Klein global advertising campaign. Photographed by Tyrone Lebon. #mycalvins Stay tuned for more.

A post shared by CALVIN KLEIN (@calvinklein) on Jan 26, 2016 at 4:05pm PST

Tyson Beckford

https://www.instagram.com/p/BGfw1w-wA54/

https://www.instagram.com/p/BANtFmOwA4Q/

Russell Tovey

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Another shot stolen from @deanhau because I know how much you guys hate these pics…

A post shared by Russelltovey (@russelltovey) on Oct 4, 2015 at 10:05am PDT

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Friday

A post shared by Russelltovey (@russelltovey) on Jan 15, 2016 at 7:26am PST

Nick Jonas

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More than a handful. @nickjonas channels Mark Wahlberg's 1992 Calvin Klein Underwear ad in the latest issue of @flauntmagazine. #mycalvins #tbt

A post shared by CALVIN KLEIN (@calvinklein) on Oct 2, 2014 at 1:44pm PDT

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ain’t going backwards #close

A post shared by Nick Jonas (@nickjonas) on Mar 25, 2016 at 6:10am PDT

Ronnie Woo

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Multitasking all day, errrr' day. #hotmess

A post shared by Ronnie Woo (@ronniecwoo) on Sep 22, 2015 at 3:53pm PDT

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Happy One Year Anniversary with this butt nugget! Dogs are seriously the best and everyone should have one. #taco #mansbestfriend #unconditionallove

A post shared by Ronnie Woo (@ronniecwoo) on Mar 6, 2016 at 5:52pm PST

Zac Efron

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Those girls are out of control. This Summer, it’s Parenthood Vs Sisterhood. Watch the @NeighborsMovie 2 trailer now! Link in bio for full trailer. #Neighbors2

A post shared by #Neighbors2 (@neighborsmovie) on Jan 19, 2016 at 8:00am PST

Calvin Harris

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The new Emporio Armani Fall/Winter campaign @armani #CalvinHarrisforEA

A post shared by Calvin Harris (@calvinharris) on Jul 27, 2015 at 8:51am PDT

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#EmporioArmani

A post shared by Calvin Harris (@calvinharris) on Feb 17, 2015 at 9:39am PST

Cameron Dallas

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Just another perfect day at the beach. @camerondallas wears the crew sweatshirt from the Spring 2016 Calvin Klein Jeans Limited Edition capsule. Photographed by @jackpierson9. #mycalvins Available now at calvinklein.com [US, HK + EU]. Link in profile to shop [US].

A post shared by CALVIN KLEIN (@calvinklein) on Apr 29, 2016 at 9:55am PDT

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Photo by @bryant

A post shared by Cameron Dallas (@camerondallas) on Jun 6, 2016 at 9:32am PDT

Marcus Collins

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So happy to be performing at Southampton Pride this year…. I will try and wear more than this on the day ?? @sotonpride2016

A post shared by Marcus Collins (@marcuscollinsuk) on Jul 29, 2016 at 5:31am PDT

Max Emerson

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Training to become the #world #calvinBall #champion. ?@cleverprimeuk

A post shared by Max Emerson (@maxisms) on Feb 4, 2016 at 11:02am PST

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If you want to audition to be in my new film HOOKED, #NOW is your chance! Check out www.HookedProject.com for instructions on how to tape your audition. (Video tutorial at YouTube.com/TheMaxVicious) #stepIntoMyOffice #castingCouch #HookedProject ?@thepaulalley

A post shared by Max Emerson (@maxisms) on Feb 3, 2016 at 12:31pm PST

Simon Dunn

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I think my Calgary Stampede attire needs a few additions. ?: bobsleighsimon

A post shared by Simon Dunn (@bysimondunn) on Jul 8, 2016 at 9:21pm PDT

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As promised. A bathroom selfie in every city I stay in! Snapchat: Bobsleighsimon

A post shared by Simon Dunn (@bysimondunn) on Jun 11, 2016 at 3:18pm PDT

Matt McGorry

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Namaste. Imastay, ok? (Extra points if you can spot a picture of my nephew, the #HTGAWM trophy and a roll of toilet paper)

A post shared by Matt McGorry (@mattmcgorry) on Feb 28, 2015 at 5:12pm PST

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You know it's gonna be a good day when you start it by drinking coffee in a robe while Coming To America is on the TV. #aTVFest #Hotlanta #scad

A post shared by Matt McGorry (@mattmcgorry) on Feb 7, 2015 at 1:36pm PST

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