Justin Timberlake and Jessica Biel are facing drama of the worst kind (Dimitrios Kambouris, FilmMagic)

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So much for newly reconciled bliss! After recently patching up the problems in their relationship, Justin Timberlake and Jessica Biel are facing drama of the worst kind ... the family kind.

The actress' brother, also named Justin, was recently employed at Timberlake's boutique tequila brand, 901 Tequila. Note the word "recently." Apparently Justin Biel left the company a few weeks ago, supposedly on good terms.

However, a video leaked on the internet and posted by TMZ suggests differently. In the vid, Biel sits in his self-described "s----- one-bedroom apartment" and rants about his sister's beau and his seeming failure as a business man.

"I've been waiting for [Timberlake] to do something with this f----ing brand," rages Biel. "Make a song about it, put it in a goddamn video, hold it up, take some pictures, I don't care -- just do something because we're dying on the motherf---ing vine here!"

Biel goes on to sarcastically describe ways Timberlake and the sales team could increase prophets of 901 Tequila. The remarks get pretty graphic, but do include one tip that seems directly pointed at his sister's boyfriend: "901 Tequila," says Biel. "So g-- damn exclusive our own CEO doesn't even drink it."

Quick to jump on damage control duty, a rep for the alcohol brand claims Biel filmed the videos as part of a marketing campaign -- although it's hard to see how such a violent, hateful outburst could sell tequila.

"Justin Biel's video was intended to be one in a series of videos created by 901 Tequila employees (including the brand owner) as part of a larger viral marketing campaign slated for the end of December," says the rep. "It was released prematurely without our knowledge and prior to the final edit."

Biel himself also tried to backtrack once the video surfaced, saying on his Facebook page: "For all you knuckleheads that haven't figured it out. This is just a joke. hahah. Got ya."

Is this video an ultimate diss at his sister's beau, or is it really, as 901 claims, all part of a marketing strategy?

Edited By: GABRIELLA OSAMOR