Nikki Grahame Channel 4 doc viewers in tears over Big Brother icon as Dermot O'Leary and Vanessa Feltz appear

Niki Grahame's life was celebrated and her struggles documented in a Channel 4 documentary on Thursday night. Viewers who tuned in were left in tears as family and friends remembered the star ahead of the first anniversary of her death.

The Big Brother icon tragically passed away on April 9 last year at the age of 39 following a long battle with an eating disorder. Nikki rose to fame during her appearance on series seven of the reality show in 2006 before returning to the show Ultimate Big Brother in 2010. She also regularly featured on spin-off show Bit On The Side and had her own reality series Princess Nikki on E4.

The documentary, Nikki Grahame: Who Is She?, which is a nod to one of Nikki's most memorable moments from her time in the famous house, saw her mum, Sue, speak fondly of her daughter while also recalling her final moments and the heartbreaking ritual she continues to do following Nikki's death.

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Nikki's Big Brother co-star and friend Imogen Thomas also made an appearance as did Dermot O'Leary, who hosted Big Brother spin-off Bit on the Side, and broadcaster Vanessa Feltz, who became friends when they appeared in Ultimate Big Brother together.

Dermot, who now hosts This Morning, said Nikki was TV gold, describing her as being "dynamite". He said: "You don't just think of what a great contestant she was, you think of what a lovely person she was, or how iconic she was during the time she was on television. The fundamental heart of it is she's someone's daughter and that's the heartbreak,” Dermot added, speaking of Nikki's mum Sue."

After archive footage of the pair chatting about Nikki’s illness in scenes