Big Brother 18 is slated to begin Wednesday night with an epic two-hour premiere - here's how you can watch it all unfold online.

It's that time of year again. 12 new houseguests (as well as a few rumored returning players) are set to enter the Big Brother house for a summer of lies, betrayal and cheap frog costumes.

In addition to the rumored returning houseguests, there are a few other familiar faces this time around. The cast of new players features Big Brother 16 runner-up Cody Calafiore's brother, Paulie Calafiore in addition to Big Brother 17 standout Vanessa Rousso's sister, Tiffany Rousso.

Additionally, this season's oldest houseguest is Glenn Garcia, at the age of 50. Seven of the 12 new players are 25 or younger. At 32, Tiffany is the second oldest houseguest.

Big Brother 18 will be the longest season in history, with a record 99 days, with the finale date set for Wednesday, Sept. 21.

The theme of this year's house is "Summer Vacation," as executive producers Allison Grodner and Rich Meehan in a recent statement.

"We are loving how the house theme plays into the twists and turns that the 'Big Brother' Houseguests will face this summer," Grodner said. "I don't want to give too much away, but there are quite a few things in the house that are more than just decorations."

"This season we're creating the craziest summer vacation ever inside the 'Big Brother' house," Meehan added. "It's going to be 99 days of twists and turns, with a few secrets along the way. But we're most looking forward to those moments that even surprise us...because it wouldn't be 'Big Brother' without unexpected 'showmances,' meltdowns and blindsides."

The Big Brother 18 premiere will air from 8-10 p.m. ET/PT on CBS. New episodes will also air Thursday at 9 p.m. and Sunday at 8 p.m.

If you are unable to watch Big Brother 18 on traditional television, there's still a way to watch the premiere live. Get a free trial of CBS All Access and you can watch the whole premiere live. If you've signed up for the Big Brother live feeds, you automatically have access to this live stream, considering it's all under CBS All Access.

To live tweet the premiere of Big Brother 18, use hashtag #BB18 on Twitter.

Tags
Big Brother, Reality TV, CBS