From bikinis to board shorts, Big Brother 27 contestants dazzle in their backyard swimsuit photo shoot in Us Weekly's exclusive first look

A professional gamer, an aura painter, a bridal consultant, and a professional bullrider are just some of the people who will be competing for the $750,000 grand prize this summer. The contestants’ quirky careers make them sound a bit like suspects in a murder mystery, which is perfect for the “Big Brother 27” theme: A Summer of Mystery.

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

Big Brother follows a group of people living together in a house outfitted with more than 100 cameras and 100 microphones, recording their every move 24 hours a day. Each week, someone will be voted out of the house, with the last remaining Houseguest receiving the grand prize of $750,000.

These 16 houseguests, plus a mysterious additional player, will be moving into the famous “Big Brother” house for a summer filled with competitions, alliances and back stabbing.

Season 27 of "Big Brother" premieres Thursday. Meet this year's houseguest and see how to watch the CBS original series.

Big Brother 27's first five houseguests have been revealed in a new promo, and fans quickly discovered the identities of the exciting new BB players.

The “Big Brother” 27 live feeds won’t begin until Sunday, July 13, at 12:30 a.m. ET, which is three full days after the premiere. It’s likely that the feeds are being delayed to preserve the mystery houseguest’s identity, which suggests that we won’t know who they are until the July 13 episode of “Big Brother.”

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

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