[1] Rylan Clark-Neal continued to present the spin-off show Celebrity Big Brother's Bit on the Side.

[5] On 5 December 2016, Willis released the new official eye logo for the series featuring a pop-art themed, comic style teaser with "Pop goes January" as the slogan.

Austin Armacost is an American reality television personality and model, who is best known for his role in The A-List: New York, as well as dating fashion designer Marc Jacobs.

He entered the house as an "All star" on Day 1 having previously competed in Celebrity Big Brother 16, finishing runner-up behind James Hill.

In 2006, Gascoigne won ITV's reality TV show Love Island with fellow housemate Calum Best and in 2010, she took part in Celebrity Coach Trip with her friend and Big Brother contestant Imogen Thomas.

Block is also well known for appearing on stage heavily intoxicated at the 2000 Brit Awards, as well as starring on Trust Me – I'm A Holiday Rep, The Weakest Link and Come Dine with Me.

He was also featured in the MTV show Totally Calum Best, where it detailed Best's attempts to remain celibate for fifty days.

She entered the house on Day 1 as an "All star" after competing in Celebrity Big Brother 10 and coming runner-up to Julian Clary.

They entered the house as "All stars" on Day 1 having previously competed in Celebrity Big Brother 11, finishing as runners-up behind Rylan Clark.

James Cosmo is a Scottish actor known for his appearances in films including Highlander, Braveheart, Trainspotting, Troy and The Chronicles of Narnia: The Lion, the Witch and the Wardrobe, as well as television series such as Game of Thrones.

James Jordan is an English ballroom dancer and choreographer, who had competed as one of the male professional partners on Strictly Come Dancing, from 2006 to 2013.

He entered the house as an "All star" on Day 1 having previously competed in Celebrity Big Brother 14, finishing in third place behind Gary Busey and Audley Harrison.

He was formerly married to former Miss England model and Celebrity Big Brother 5 housemate Danielle Lloyd.

Jasmine Waltz is an American model and actress, who had minor roles in films and television shows such as Femme Fatales and Secret Girlfriend.

John and Edward Grimes, known professionally as Jedward, are an Irish identical twin singing duo who rose to fame appearing as finalists on the sixth series on The X Factor.

They entered the house on Day 4 as "All stars" having previously competed in Celebrity Big Brother 8, finishing in third place behind Paddy Doherty and Kerry Katona.

Jessica Cunningham is an English businesswoman, actress, model and media personality who appeared on the twelfth series of The Apprentice in 2016, making it to the semi-finals before being fired.

She entered on Day 1 as an "All Star" having previously competed in Celebrity Big Brother 9 and becoming the sixth to be evicted.

Stacy Francis is an American singer and actress, best known for being a part of the girl group Ex Girlfriend and as a contestant in the first season of The X Factor USA.

Francis was also a cast member on reality series R&B Divas: Los Angeles and had a well publicised argument with singer Whitney Houston two days before her death over fellow housemate Ray J.

On Day 1 she entered the house to compete as a "new star" where she became the first housemate to be "edited out" of the show during the launch night twist.