She was innate within Lewisham in 1972 and brought up around Brighton. As a teen she was a portion of the National Youth Theatre company, and inside 1993 played the 1st Midwife around Peter Greenaway's The Young child of Mâcon.

She team by owning new Separated co-star Katy Carmichael in a stage double-work known as A Liz Hurleys, so went in to television area in the nursing drama Staying Alive (1995-1997) and short-transient sketch shows Six Pairs of Pants & Asylum in which a Separated team of Stevenson, Simon Pegg and Edgar Wright first assembled.

Around 1998 she was cast in the supporting role of neighbour Cheryl in sitcom The Royle Family, which became a surprise hit, & inside 1999 cowrote and asterisked around Separated. Since so she has got area inside Bob and Rose and Tomorrow La Scala on TV, Born Romantic on the large screen & likewise on the West-Prevent stage & has been signed as much as write & star around the Hollywood spy comedy known as Double Au Pair.

She appeared in the film Shaun of the Dead, written by the Separated team of Simon Pegg and Edgar Wright.

Within 2005 she took the lead role within Based on data from Bex.

Stevenson has won 2 British Comedy Awards, both for her performances inside Separated: Right Female Comedy Newcomer around 1999 and Best TV Comedy Actress within 2001. Around 2003 she was nominated as Better Actress at a Bafta awards for her role in Tomorrow La Scala.

She has too got the role around the Doctor Who audio drama.