The full 2015 cast lineup of the upcoming "Celebrity Big Brother: UK vs USA" has allegedly leaked online. Based on the leaked information, 12 celebrities will have the chance to revive their careers as the world's infamous house reopens this month.

Something big has been planned for "Celebrity Big Brother: UK vs USA." Aside from merging two powerful nations in just one house, fans are also excited to know who among the famous people will enter the house in what is dubbed as the "ultimate summer smackdown."

While Channel 5 has remained mum on the major details of "Celebrity Big Brother: UK vs USA," we compiled the important information we know so far about the show.

1. Official Start Date

While no official start date has been revealed yet, BB host Emma Willis has previously hinted the show will be returning mid-August. But according to Daily Mirror, some have reported Aug. 27 as the start date. Channel 5, on the other hand, confirmed that the show will start in Week 35, which will be within Aug. 24 to 30.

2. Theme

The show is reportedly taking on a US vs UK theme, which means the best of British celebs will take on the greatest America has to offer, in another bid to boost the ratings of the show.

"The reason bosses have come up with this idea is because of the impact Perez had on the January series," a source said about the showrunners decision regarding its theme. "He was so out there and caused such mayhem that producers want to take it to the next level for the new show. They hope that by pitching Brits against Americans they will capitalize on our cultural differences and fireworks will ensue."

3. Cast

There have been a lot of rumors circulating online about "Celebrity Big Brother: UK vs USA" full cast lineup. In the alleged leaked lineup, Ok! Magazine revealed that the list included 12 celeb names including Scott Disick, Eamonn Holmes, Janice Dickinson, Dan Osborne, Natasha Hamilton, Vicky Pattison, Sherrie Houston, Stevi Ritchie, Tila Tequila, James Hill, wrestler Chyna Laurer and former "Teen Mom" star Farrah Abraham.

In addition to the list, also rumored to enter the house is comedian Bobby Davro, who was offered £75,000 to join the show along with Hamilton. Selfie queen and labor councilor Karen Danczuk, "EastEnders" star Jacqueline Jossa, Kathy Griffin, James Hill, Dapper Laughs, "X-Factor" contestant Chloe Jasmine, former soap actress Danniella Westbrook, glamor model Keeley Hazell and ex-pro wrestler Hulk Hogan are also rumored to enter the house.

The rumored lineup list, however, is allegedly fake, Xposé noted. And the aforementioned celeb names are also unconfirmed. But one thing is sure, "Celebrity Big Brother: UK vs USA" will be hosted by Emma Willis and Rylan Clark.