BIG BROTHER: Premieres Monday, 7.30pm (AEST), Seven Network / 7plus
In what has become the trend for reality TV these days, Big Brother celebrates reaching maturity at 21 by bringing back former housemates.
Those considered Big Brother "royalty" are Reggie Bird, 42, 2003 winner and Tim Dormer, 37, 2013 winner. But there is a great deal being made of 34-year-old Tully Smyth's return, along with former housemate, and love interest at the time, Anthony Drew, 33, both from the 2013 season.
Returning along with them are Dave Graham, 42, 2006 housemate; Estelle Landy, 33, 2012 housemate and Layla Subritzky, 33, 2012 runner-up.
The person slipping under the radar in all the promos however, is the biggest Big Brother winner of them all, Trevor Butler, 48, winner of the 2004 season - the only housemate in Australia to ever take home one million dollars.
Big Trev also popped the question on national TV to his now wife Breea, with whom he has two boys aged 14 and 11.
On his previous Big Brother journey Big Trev would often trick and scare his housemates to amuse himself.
"I was a bit of prankster," he admits. "I'm pretty sure that's why they put me in the house, to take the focus off the drama and remind everybody it's a game."
When the call came to join the 21st season of Big Brother, Trev jumped at the chance.
"I was in lockdown for three months in New South Wales and couldn't get across the border to work [on his radio program on the Gold Coast's 102.9 FM]. The opportunity couldn't have come at a better time."
But he admits that after 18 years, the idea was a bit daunting.
"In my day it was all public scrutiny in the voting. Nowadays it's very different."
Trev watched "bits of the seasons" but says his strategy won't change that much from his first time in the Big Brother house.
"My strategy is just being me. I'm the only person in [the show's] history who never got nominated. I wanted a trophy for that," he says.
Of the other returning housemates, he thinks Tim and Reggie will do well.
"I reckon they are the king and queen. They are the two most recognisable contenders," he says.
"I'll stay easy going. I'm not about burning bridges because you can't rebuild them.
"I try not to be affected by the drama. You have no idea until you get in there what they're [the housemates] really like."
As far as the physical challenges that have become de rigueur in the Big Brother house, Trev says he should have done a bit more training.
"I kinda de-trained. If I had more notice maybe I would have, but we were in lockdown and couldn't go out [when the filming started].
"It depends on what the challenges are. If they are mental I'll fail. But if there is a buffet challenge I'll be great. But really, I'm just in there to diet."
Trev says he doesn't know who the biggest threat will be.
"I reckon it will be more the new guys."
Apparently Breea was OK with the idea he could be away for 62 days.
"It will be the longest time I've spent away from the family, but they've [his boys] got a really good bond with their mum.
"I'll be best mates with whoever is the best cook."
If he is the first two-time Big Brother winner Trev wants to write a children's book.
"It will be based on the boys. I've got some great artists, including Breea's mum, and I've been writing down ideas for years."
Trev says he is going to "have a red hot go".
"I don't care if I get voted out. I think I'll have the best time, I'm really looking forward to it, there'll be a lot more happening than in my year."
There will certainly be a lot of tension if the promos are anything to go by.
A total of 21 housemates will be cut off from the outside world, with cameras and microphones recording their every move 24 hours a day, seven days a week. For the final contenders that's 62 days - how will the newbies cope?
The first five newcomers are entrepreneur Aleisha, 24; fitness fanatic Joel, 26; Big Brother superfan Johnson, 25; ex-international model Josh, 32; and intimacy coach Sam, 31.
