(Above: A few of the official bags of Comic-Con 2015.)

Every year around this time, comic and pop-culture fans of all ages head to The Golden State for several days of panels, celebrity sightings, screenings, parties and more. The reason? Comic-Con International: San Diego and it all begins with Preview Night tomorrow, July 8.

Of course our colleagues at Warner Bros., Turner and HBO have been working their butts off to bring attendees only the best, most exclusive content and events throughout SDCC and while we cannot possibly list every happening, you can scroll down for some highlights and not-to-be-missed events.

For a complete schedule of events, click here.

Warner Bros. Television Group will once again bring the heat to SDCC with 18 series, including 13 returning fan-favorites and five Comic-Con debuts. WBTVG is continuing its Preview Night tradition with exclusive world premiere screenings of the pilot episodes of four of the most highly anticipated series of the 2015-16 television season—Supergirl, Blindspot, Containment and Lucifer—as well as a brand-new episode of Teen Titans Go! Friday's lineup includes Inside The Big Bang Theory Writer's Room, Q&As with the stars of Lucifer, The 100, iZombie, and many others. On Saturday, "Super Hero Saturday Night" welcomes fans into the worlds of some of DC Comics' greatest characters during a three-hour extravaganza. The Vampire Diaries, Supernatural and Childrens Hospital are all slated for events Sunday.

On Friday, Seth Meyers will moderate a Game of Thrones panel featuring a slew of Westeros royalty. Director David Nutter and executive producer Carolyn Strauss are scheduled for the event along with Gwendoline Christie (Brienne of Tarth), Natalie Dormer (Margaery Tyrell), Sophie Turner (Sansa Stark), Carice van Houten (Melisandre), Maisie Williams (Arya Stark) and others. 

We would be remiss not mention all the sweet swag available at SDCC this year. Once again, Warner Bros. and Comic-Con teamed up to create the official bag – or bags, to be more accurate – of the convention. Thirteen collectable versions featuring double-sided artwork will be handed out to convention-goers. See a sneak peek below.

2015 also marks the seventh year that Warner Bros. is the official Comic-Con hotel keycard sponsor. Arrow, The Flash, Gotham, Teen Titans Go! and the highly anticipated new series Supergirl will be individually featured on limited-edition collectible keycards (see images below) at top hotels throughout the San Diego area. Teen Titans Go! will be featured across five separate keycards that include a special Comic-Con-only QR code that will enable guests to access and watch a free episode of the hit series from Warner Bros. Animation.

But there's more! WBTV partnered with TV Guide Magazine to create four collectable covers for its special Comic-Con edition – see below.

Warner Bros. Pictures will also be showcasing several of its upcoming feature releases on Saturday. Director Zack Snyder and stars Ben Affleck and Henry Cavill will join castmates on the main stage for a sneak peek of Batman v Superman: Dawn of Justice. Pan and The Man from U.N.C.L.E. will also be featured.

DC Entertainment will be on-site with an impressive 19 panels. The DC Entertainment Events app has been updated with expanded functionality and with a new tab just for your SDCC-specific needs. It’s also the only place you can find out when (and where) our creative teams will be signing. Download it now (available on Apple’s App Store or the Google Play Store); you don't want to miss any of DCE’s panels or talent signings.

Throughout SDCC, Warner Archive Collection is celebrating the work of influential visual effects wizard Ray Harryhausen and the renowned Hammer horror films collection (with a tribute to the late Christopher Lee). Famed film director Joe Dante will be a special guest and discuss his 1987 hit Innerspace, and animation fans will enjoy a salute to the 50th anniversary of Hanna-Barbera’s beloved Atom Ant and Lucasfilm’s heralded 1983 animated feature film, Twice Upon A Time.

On the Turner front, Conan is slated to become the first late-night show to ever be broadcast from SDCC. Oh, and The Flaming C is back:

Adult Swim is hosting a candlelight vigil July 11 to honor and remember the end of Aqua Teen Hunger Force. In lieu of flowers, attendees are asked to bring fan art. There are also a ton of panels, live-streaming events and screenings scheduled – Robot Chicken, Rick and Morty, etc. – so don’t. miss. out.

The Adventure Time Royal Ball is back July 9 for a second time around. Attendees will get a first-look at a brand-new episode and a see the world premiere of the newest Cartoon Network series, We Bare Bears.

There's a The Last Ship panel July 9 featuring a sneak preview and discussion with the cast of the hit TNT series, including Eric Dane, Rhona Mitra and Adam Baldwin.

And fans get to say goodbye to TNT's Falling Skies with a look back at favorite moments, gruesome deaths and memorable alien battle scars July 10.  

Whew! That is a lot of A-list events, even for us. Don't forget to check out the complete schedule; we wouldn't want you to miss a thing.

Please note that all cast and producers scheduled to attend are subject to change.