With the much-anticipated third season of Adult Swim's "Rick and Morty" set to premiere on Cartoon Network in less than 2 weeks, the show's creators Justin Roiland and Dan Harmon have finally revealed some of the secrets fans have been waiting years to discover. In an interview with IndieWire, the pair discussed the personalities of the characters they have created for the show, the likelihood of a crossover episode, and who viewers can expect to hear lending their voices to upcoming episodes.

Star-studded list of guest stars

"Rick and Morty" has certainly never been shy about adding celebrity voices to its roster, as Hollywood talent has been eager to work with Harmon ever since he created NBC's acclaimed, quirky comedy "Community." Past seasons of the adult cartoon have included the voice talents of Alfred Molina, Stephen Colbert, John Oliver, Keegan-Micheal Key and Jordan Peele, (of Comedy Central's "Key and Peele,") and even German film auteur Werner Herzog.

Without revealing much about the role each actor may have in Season 3, Roiland and Harmon did share the names of several A-list celebrities fans may recognize when they appear. Included in the list were "Silicon Valley" actor Thomas Middleditch, "Community"-alumni Joel McHale and Gillian Jacobs, Susan Sarandon, and Danny Trejo. Also making an appearance will be legendary actor Keith David, who guest starred in the past as the President of the United States on the "Rick and Morty" episode "Get Schwifty."

Duo will appear at Comic Con this weekend

Fans fortunate enough to be attending San Diego Comic Con this weekend will be treated to a special, extended clip from the new season, outside of the premiere episode that has already aired on Cartoon Network.

A special supply of "Rick and Morty" merchandise will also be on-hand in the traveling "Rickmobile" during the pair's panel presentation.

As for the rumored crossover episode between "Rick and Morty" and other famous television shows, Roiland and Harmon may have put that to rest during their most recent interview as well. While the creators certainly haven't crossed the idea off their list of possibilities, they admit it may be easier said than done; In order to fully implement their idea of a crossover episode, they would want to include characters from several shows across multiple television networks and platforms.

Given the amount of legal wrangling and permissions involved in completing such an episode, fans shouldn't expect such an episode any time in the near future.

Season 3 of "Rick and Morty" premieres July 30 at 11:30 p.m. ET/PT on Adult Swim/Cartoon Network.