The Big Brother housemates have all made their nominations for this week's eviction but there will be a huge twist as the axed contestant will move into a secret room

Big Brother has returned to screens with plenty of twists and turns as tensions continue to build in the house.

Already, three housemates have been evicted and one was removed after repeated rule breaking as the ITV reality show made its huge comeback for its 25th anniversary.

Hosts Will Best and AJ Odudu previously teased that the Big Brother game was changing, and this week the housemates nominated again, choosing who they want to see up for eviction.

But little do they know, there's another huge twist in store. This time around, viewers will be voting for who they want to be taken out of the main house and placed into a secret room.

They will then be greeted by two former contestants where they are expected to be given a number of secret tasks.

Caroline was the only housemate who could not be nominated after securing herself two weeks of immunity but who is up for nomination this week?

We've put together everything you need to know, including how to vote.

Who is up for eviction this week on Big Brother?

Big Brother once again called the housemates into the Diary Room to cast their nominations.

However, Tate was forced to make his nominations face to face after Marcus paid for the deal using his eyeball currency.

It was revealed during Tuesday's (October 14) episode that Nancy and Sam received the most nominations from their fellow housemates.

Nancy received seven nominations from Cameron, Feyisola, Jenny, Marcus, Richard, Teja and Zelah. Meanwhile, Sam received four nominations from Elsa, Jenny, Marcus and Tate.

The housemates are unaware that the "evicted" contestant will just head into a secret room and will be joined by two familar faces who "left too soon".

How to vote in this week's Big Brother eviction?

ITV viewers can go online at www.itv.com/vote and follow the instructions to cast their votes. However, fans will have to register before voting.

Viewers get five votes per registered mobile number and refresh each voting window. Fans are being asked to vote for the housemate who they wish to send to the secret room.

Big Brother airs Sunday to Thursday at 9pm on ITV2 and ITVX