Rose Marion Tyler is a fictional character in the British science fiction television series Doctor Who. She was created by series producer Russell T Davies and portrayed by Billie Piper. With the revival of Doctor Who in 2005, Rose was introduced as a new travelling companion of the series protagonist, the Doctor, in his ninth and tenth incarnations. The companion character was key in the first series to introduce new viewers to the mythos of Doctor Who, which had not aired regularly since 1989. Rose became the viewers' eyes into the new world of the series from the companion's perspective. Piper received top billing alongside Christopher Eccleston and David Tennant for the duration of her time as a regular cast member. The character was a series regular for all of Series 1 (2005) and 2 (2006). Piper later reprised the role in a supporting capacity in Series 4 (2008) and the New Year's special "The End of Time" (2010). Piper further played a sentient weapon called the Moment, which utilises Rose's image, in the 50th anniversary special "The Day of the Doctor" (2013). Piper would return to the series once again in the Series 15 finale "The Reality War" (2025), where the Fifteenth Doctor regenerates into an unknown character resembling Rose.