Batman Day: See how Hollywood is celebrating the Dark Knight's anniversary

Saturday marks Batman Day, a time to commemorate the creation of the Dark Knight and appreciate the cultural impact the character has had on the world. In addition to special events held around the country, some celebrities have joined in on the fun. 

Director Zack Snyder had most beat when he revealed the first look at J.K. Simmons in the role of Commissioner Gordon from Justice League, while Warner Bros. revealed a new poster for The Lego Batman Movie.

Elsewhere, Wonder Woman actress Gal Gadot and DC superfan Kevin Smith commemorated Batman Day on social media, and WB released a highlight video of big-screen Batmans, including Michael Keaton, George Clooney, and Val Kilmer.  

Happy Batman Day everybody! #BatmanDay pic.twitter.com/Ox8SKCFVtk

— Gal Gadot (@GalGadot) September 17, 2016

Celebrate #BatmanDay with all your favorite Dark Knights! pic.twitter.com/HdsfhYXRNg

— Batman v Superman (@BatmanvSuperman) September 17, 2016

Even folks from Team Marvel saluted the DC hero. Stan “The Man” Lee saluted his Mallrats castmate and current Batman Ben Affleck, and Guardians of the Galaxy writer-director James Gunn posted some fan art of Groot and Rocket reimagined as Batman and Robin. 

My Mallrats co-star @BenAffleck… Whatever happened to that guy? Happy #BatmanDay if you’re into that kinda thing pic.twitter.com/EK7f5NucHf

— stan lee (@TheRealStanLee) September 17, 2016

Happy #BatmanDay, y’all! pic.twitter.com/9tWPv9tKY0

— James Gunn (@JamesGunn) September 17, 2016

The official Twitter account for the famous TCL Chinese Theatre, located on the Hollywood Walk of Fame, posted a throwback image of the theater when Tim Burton’s Batman was playing in 1989.  

#BatmanDay! Here’s a shot of the theatre when #Batman was playing in #1989. #MichaelKeaton #TimBurton pic.twitter.com/CgWbJqt9ch

— TCL Chinese Theatres (@ChineseTheatres) September 17, 2016

Gotham star Cameron Monaghan wished Bats a happy birthday with a very Joker-y photo, while Joker voice actor Mark Hamill (Batman: The Killing Joke) saluted Kevin Conroy, who’s long voiced the Caped Crusader in animated series and films.  

Happy #BatmanDay pic.twitter.com/obZJZVkJ7R

— Cameron Monaghan (@cameronmonaghan) September 17, 2016

So it’s officially #BatmanDay? For me, that means it’s @RealKevinConroy Day. Enjoy YOUR day Kev! #NoJokerDay pic.twitter.com/yWFrQiuLN3

— Mark Hamill (@HamillHimself) September 17, 2016