The final episode of the beloved series aired in December 2016, after five series and 32 episodes.
Caroline’s character was mentioned throughout series four and special episodes between 2009 and 2013, but she did not make any further appearances.
The actress will be showing off her baking skills on tonight’s episode of The Great Celebrity Bake Off for Stand Up to Cancer.
She will be joined by Queer Eye star Tan France, comedian and Masked Singer host Joel Dommett, and British professional tennis star Johanna Konta.
The Great Celebrity Bake Off for Stand Up to Cancer airs tonight at 8pm on Channel 4.