Nicola Rachel-Beth Grahame (born 28 April 1982 in Watford, England) is a British model, author, columnist, fashion designer and television personality, who rose to fame in the UK when she was chosen to be a housemate on Big Brother 7 in 2006. Grahame's conspicuous temper tantrums divided viewer opinion during her time on Big Brother and subsequently led to her being given her own reality television show entitled Princess Nikki.
Grahame won a National Television Award for Most Popular TV Contender in 2006, and featured in a series of advertisements for Domino's Pizza. Grahame had a regular column in OK!'s "Hot Stars" magazine. She appeared in the tenth series of Big Brother, competing in a Silent Disco task against Karly Ashworth, as part of the Big Brother UK Tenth Anniversary Celebrations. After entering the house again in 2010 she placed 2nd in Ultimate Big Brother. She returned in the sixteenth series of Big Brother in 2015. On 3 March 2016, Grahame was one of two 'international wildcards' who won a public vote to enter the fourth season of Big Brother Canada, she entered the house on Day 7 along with Tim Dormer who won the tenth season of Big Brother Australia and finished in sixth place.