AceShowbiz - This is what muppets do when kids are not around. Brian Henson, son of the late Muppets creator Jim Henson and director of The "Muppet Christmas Carol" and "Muppet Treasure Island", comes up with "The Happytime Murders" which depicts puppets unlike you've never seen them before.

The upcoming movie is not kid-friendly as the newly-released red-band trailer clearly suggests. Starring Melissa McCarthy in the lead human role, it is packed with filthy jokes and some profanities, with the puppet characters mostly responsible for them.

According to the official synopsis, this is "No Sesame. All Street. 'The Happytime Murders' is a filthy comedy set in the seedy underbelly of Los Angeles where puppets and humans coexist. Two clashing detectives with a shared secret, one human (Melissa McCarthy) and one puppet, are forced to work together again to solve the brutal murders of the former cast of a beloved classic puppet television show."

Throughout the trailer, McCarthy's character encounters puppets propositioning sex at different occasions. She's also forced to snort ecstasy in another scene. "That is good s**t!" she yells as she gets high with a gang of puppets.

Joel McHale plays an FBI agent who clashes with the puppet detective during the murder investigation. Maya Rudolph portrays the puppet detective's secretary who has to bear with her boss' raunchy romp in the office.

Elizabeth Banks and Leslie David are also featured in the sneak-peek video.

Henson directed the movie and has dubbed it a "wild" crime thriller. "It's a really cool and weird and wonderful piece," he told SyFy.com. "And it's R-rated so it's really odd for me. But I'm really enjoying doing it."

Jon Hoeber, Erich Hoeber, Todd Berger and Dee Robertson teamed up to write the script. The R-rated movie has been in the works since 2008 with Cameron Diaz, Jamie Foxx and Katherine Heigl previously attached to star.

It is set to be released in the U.S. on August 17.