And you thought your wedding was a headache?

Fox will put the "d" in dysfunctional when it premieres "My Big Fat Obnoxious Fiancé," a new reality show that puts a twist — or two or three — on walking down the aisle.

The six-episode series, premiering Jan. 19, revolves around Randi, a 23-year-old schoolteacher who's trying to con her family into believing she's marrying "big fat obnoxious" Steve — who she supposedly met and fell in love with while they were both on a reality show.

Steve manages to offend Randi's family at every turn with his boorish behavior, while his equally offensive family adds further fuel to the familial fires with their shocking antics.

Randi must pull off the ruse and "make it all the way through the wedding ceremony and final 'I do's' in order to win a million dollars," according to Fox (search).

What Randi doesn't know, however, is that Steve and his "family" are really professional actors who are improvising as they go along - while taking Randi for the emotional ride of her life.

"The joke is on Randi because she thinks that Steve is also a reality show contestant duping his family into believing the same charade," Fox said in describing the show. "In actuality, Steve and his TV family are professional actors putting their improv skills to the ultimate test."

"My Big Fat Obnoxious Fiancé," hosted by Claudia DiFolco, was produced in total secrecy and was kept under wraps until its unveiling yesterday.

It will debut 9 p.m. on Jan. 19 - immediately after the third-season premiere of "American Idol," which has been a consistent ratings winner for Fox.

"Obnoxious Fiancé" is being produced by Rocket Science Laboratories (search), the folks behind "Joe Millionaire," "Married By America" and "Temptation Island."