Celebrity Big Brother 19 was the nineteenth series of the British reality television series Celebrity Big Brother, hosted by Emma Willis and narrated by Marcus Bentley. The series launched on 3 January 2017 and concluded after 32 days on 3 February 2017, making it the joint longest celebrity series to date along with Celebrity Big Brother 17. The series was shown on Channel 5 in the United Kingdom and 3e in Ireland.Rylan Clark-Neal continues to present the spin-off show Celebrity Big Brother's Bit on the Side. It is the twelfth celebrity series and eighteenth series of Big Brother overall to air on Channel 5.
With eighteen housemates, this series has the most housemates since the show began in 2001. It also marks the only celebrity series to have housemates returning to represent previous series, and is the first to include two sets of late entrants. As well as this, it also included the voluntary exits of Brandon Block and Ray J.
On 3 February 2017, the series was won by Coleen Nolan having received 32.65% of the final vote, with Jedward finishing as the runners-up with 29.91% of the final vote.Kim Woodburn was the highest placed "New star" finishing in third place with 14.52% of the final vote.
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.