Chris Hardwick, Lydia Hearst
“The Walking Dead” after-show host Chris Hardwick married Lydia Hearst in Pasadena, Calif., on Saturday, Aug. 20. Pictured: Hardwick and Hearst attend the 2016 Vanity Fair Oscar Party Hosted By Graydon Carter at the Wallis Annenberg Center for the Performing Arts on Feb. 28, 2016 in Beverly Hills, Calif. Getty Images/Pascal Le Segretain

Chris Hardwick and Lydia Hearst are married!

The “Talking Dead” host and the publishing heiress exchanged “I dos” on Saturday, Aug. 20, at The Langham Huntington, a luxury resort hotel in Pasadena, Calif., according to Entertainment Tonight.

Hardwick, 44, donned a custom Prada tuxedo during the wedding ceremony, which was attended by about 450 guests. The 31-year-old bride, on the other hand, wore a custom-made Christian Siriano gown, which she matched with a pair of pavé crystal Stuart Weitzman shoes.

Since Hardwick and Hearst share a love for science fiction, their wedding florist Mark Held drew inspiration from the couple's favorite sci-fi and comic book series. People reported that Held put red roses, Tardis blue hydrangea and Vanda orchids around the venue to give the nuptials a very unique touch.

The guests, including Yvette Nicole Brown, Nathan Fillion, Tyler Shields and Michelle Trachtenberg, reportedly dined on an elaborate four-course meal which included Thai spiced prawns, arugula salad, Chilean sea bass and beef filet.

Hardwick and Hearst’s nuptials also had a philanthropic twist, as the couple waived the traditional wedding registry and instead asked their guests to donate to a number of charities.

“[Lydia] and I are incredibly fortunate people and didn't feel right taking gifts from anyone so our wedding registry instead is a menu of five wonderful charities that we asked our guests to pick any or all of to make a donation toward: St. Jude Children's Research Hospital, Operation Smile, GLAAD, Elizabeth Glaser Pediatric AIDS Foundation and the Best Friends Animal Society.” the Nerdist CEO wrote on Instagram on the eve of their special day. “If you're feeling generous and able, this support of others is the best way to support us on our magical day! No matter what, we appreciate you!!!”

On the same day, Hardwick also posted a photo from their wedding rehearsal in which the newlyweds could be seen locking lips.

Hearst, whose grandfather is the late publishing titan William Randolph Hearst, also expressed her excitement for the big day with a zombie-themed pic of her and Hardwick which she posted on Instagram.

A week before the nuptials, Hearst gave a sneak peek of her wedding gown on Instagram. She also shared a picture of Hardwick's tuxedo-fitting in Beverly Hills last month.

Hardwick popped the question to Hearst after winning the Emmy for Best Creative Achievement In Interactive Media (Social TV Experience) for his show "@midnight With Chris Hardwick" last September. He shared a pic of Hearst’s engagement ring on Instagram to announce the big news.

Congratulations to the couple!