'Big Brother 18' Spoilers: Mystery Guests Confirmed In 'BB18' Cast

Big Brother 18 spoilers reveal some heavy hints about mystery guests. This could mean the BB18 cast is about to have some returning houseguests officially revealed. A Big Brother fan in Canada took to Twitter to share a new television advertisement from CBS. Within the commercial, the voiceover talks about the 12 "new" houseguests, introduces the brother of Cody Calafiore and the sister of Vanessa Rousso, and then hints about "mystery guests."

The silhouette in the image above could be representative of the four returnees, but it could also be a ruse to play with the minds of fans. There have been plenty of previous Big Brother 18 spoilers on the net and social media, each of which has hinted that there could be returning houseguests in the BB18 cast. This commercial seems to confirm that is going to take place. This would be considered the first time that production has given any confirmation to the Big Brother rumors.

It's interesting to note that CBS is showing different commercials to fans in Canada than in the United States. Most of the advertisements in the U.S. have served as explanations of how the show works, including breaking down how they are considered "rats in a maze" and fans can "tap on the glass" this season. There has been a lot of mystery about how the summer 2016 season will work, so it also shouldn't be surprising that CBS is working hard at creating additional intrigue.

As previously reported by the Inquisitr, the BB18 cast list includes Tiffany Rousso and Paulie Calafiore, the siblings of past houseguests. These facts were never a real secret, as even in the interviews that production made available, it was noted that they were related to Cody and Vanessa. What has long been rumored, though, is that some of the other houseguests could have ties or relations to veterans of the show. Could it them be the case that all the returnees will have a counterpart already within the group of "new" houseguests?

These Big Brother 18 spoilers seem to confirm the original notion that there will be 16 members of the BB18 cast. The schedule has the houseguests competing for 99 days this year, making it the longest season in the 18-year history of the show. That gives a lot of time for twists, turns, double evictions, surprise competitions, and maybe even the return of the Diamond Veto. Production might have some innovative improvements to the show coming as well, with a two-night season premiere coming up soon. That seems to include the elimination of the Battle of the Block competition.

The BB18 cast is expected to head into the house this weekend, with Saturday, June 18, the most likely date for Day 1 of the season. The TV schedule begins on Wednesday, June 22, with a two-hour premiere beginning at 8 p.m. PT/ET. The second episode is then on CBS on Thursday, June 23, with a start time of 9 p.m. ET. Once that Thursday episode ends on the West Coast (10 p.m. PT/1 a.m. ET), the live feeds will get turned on, allowing die-hard fans to catch up on the progression of the game.

Until the live feeds get turned on, there likely won't be further Big Brother 18 spoilers, unless a leak takes place from someone involved in production. The game could already be underway, with all the BB18 houseguests already sequestered, so now fans just have to wait for the 2016 episodes to finally begin to start seeing the action unfold.

[Photo by Frederick M. Brown/Getty Images]