Catherine Ann "Katy" Manning is an English-Australian actress, television presenter, voice artist and former model. Although she has made many appearances on both screen and stage, Manning is best known for her part as the companion Jo Grant in the BBC science fiction television series Doctor Who. Manning initially played the role in the 1970s but also reprised the role in the Doctor Who spin-off The Sarah Jane Adventures in 2010. She is also well known for voicing Iris Wildthyme in the audio series Iris Wildthyme for Big Finish Productions since 2005.