With a new Big Brother season premiering on Wednesday, July 6, fans are speculating about what may happen during the 24th installment of the CBS competition. Before the premiere date for the upcoming season was announced, Julie Chen Moonves was posting throwback cast photos on her Instagram account, causing fans to speculate about what that might mean. Some people who love BB have a theory that four alums may be returning to the show.

Big Brother fans are always on the lookout for new clues, and they noticed something that Julie was consistently posting on her social media accounts. She added a BB season 14 cast photo, as well as a picture from season 18. That got fans wondering why she was looking back on past seasons of the show. Even some former houseguests chimed in, commenting on the host's pictures of prior seasons. There are some interesting reasons why certain fans expect four alums to return.

Related: Big Brother: Why The Game Needs An Overhaul In Season 24

There are a lot of avid BB fans who believe that Julie posting all of those throwback photos might mean that four Big Brother alums could come back to the show to compete as coaches, just like what was done for BB14. One fan, lionsbane1764, started a Reddit thread that stated, "So Julie has been posting throwbacks to seasons for the past couple of weeks on Instagram. The first was BB14 and today was BB18 with the caption ‘What do you remember’ and it seems that some people, especially on Twitter, think that this could mean we might have 4 returning houseguests this summer. Whats your thoughts? If you think it’ll happen who would you like to see/think would come back?"

Host Julie Chen Ready For The Live Show

This thread got many fans talking, stating that they would love a "second chance" season for houseguests who got evicted first , while others said that they would like a "vets versus newbies" season, as with other countries' Big Brother versions. However, while some fans are believing in this theory, others think that Julie's post was just a promo for the upcoming season. It wouldn't be the first time that BB viewers got a theory wrong, and only time will tell if this fan theory is right.

With Big Brother 24 premiering on Wednesday, July 6, fans have a little over a month to speculate about who will be in the cast, and what the theme for the upcoming season might be. The cast list is usually released a week in advance, and if that trend continues, fans should expect the full cast details by the final week of June. Until then, fans will have to do some more sleuthing, and wait to see if their guesses about the cast are right.

Next: Big Brother: How A Legends Season Could Happen

Sources: Cheatsheetlionsbane1764/Reddit

Big Brother 24 premieres Wednesday, July 6, at 8 p.m. EST on CBS.