Something old, new, borrowed and...zombie

Thanks to hits like "The Walking Dead" and the teen romance "Warm Bodies," zombies have been trending for a while now. But with the zombie-apocalypse-themed Brad Pitt blockbuster "World War Z" due to hit theaters in June, this may be the perfect summer for undead-themed nuptials. Brains anyone?

Read on to see more unusual wedding theme ideas.

Under the Sea

For the couple that loves the sea and isn't big on talk, an underwater wedding may be just the right choice.

In this photo, Daniel Winchester, right, a celebrant, looks on after conducting an underwater blessing of Aquarists Kathryn O'Connor, center, and James Oliver on Valentine's Day in the Ocean Reef Display in the London Aquarium London, Feb. 14, 2011.

"Star Trek"

If you and your betrothed hope to "live long and prosper" together, a "Star Trek" theme could be perfect.

In this photo, "Star Trek" fans Mikel and Craig Salsgiver display the Vulcan greeting after renewing their vows on the bridge of the Starship Enterprise at the "STAR TREK: The Experience" attraction at the Las Vegas Hilton.

Disney Fairy Tale

Many little girls dream of being a Disney princess when they grow up, fewer actually act out the fantasy. But if you find your prince, or princess charming, why not? From princess-themed rings and dresses to full blown wedding planning, Disney has created an entire industry out of making your wedding day dreams come true.

In this photo, bride Mayumi Kagoshi and groom Takayuki Abiko walk in their wedding procession at Tokyo Disneyland, Sept. 28, 2012.

A Simpler Time

Since 1995, Dan Rhymer has been donning bib overalls, a top hat and a coat to perform Hillbilly Weddings in his native Gatlinburg, Tenn. For $75, Rhymer will conduct a simple ceremony complete with complimentary Bouquet & Boutonniere. He will even take complimentary photos of the happy couple, like the one seen here, if you provide your own camera.

Hello Kitty

There are cat people, and then there are Hello Kitty people. For decades, the Japanese cartoon character has enjoyed a cult-like following and the merchandizing to match. With everything from Hello Kitty jewelry to cake toppers and even cutlery available, a themed-wedding would be a cinch to pull off.

In this photo a bride and groom pose with Hello Kitty and her boyfriend, Dear Daniel, at the Daiichi Hotel Tokyo, Oct. 21, 2005.

Goth

Inspired by the dark and mysterious? How about a gothic wedding?

This couple, Tony and Angela Lightowler, chose to renew their marriage vows during Whitby Gothic Weekend in Whitby, England.

Hit the Slopes

Whether you are a professional athlete or just love winter, a ski resort can be a romantic and unique place to get married -- even more so if the ceremony is held on the trail like this couple.

This bride is an avid snowboarder and incorporated her love of the sport into her big day.

Lego my bouquet!

Themes need not take over the entire wedding, even small details can add a touch of fun to a traditional affair. This couple had a shared love of Legos and used the toys to create their escort cards.