The cast of "Big Brother" Season 27 has been revealed — with one "Mystery Player" set to make a surprise entrance.

Here are some of fans' best guesses for who might be the mystery houseguest of BB27: ...

The houseguests of ‘Big Brother’s 27th season were unveiled shortly before the premiere! Get to know each of them and their ...

These 16 houseguests, plus a mysterious additional player, will be moving into the famous “Big Brother” house for a summer ...

Rylie Jeffries is a superfan, and if he's anything like past Oklahoma representation on the show, he's sure to leave his mark ...