Katie Griffiths

Katie Griffiths (born 6 April 1989) is an English actress. She is best known for her role as Chlo Grainger in the BBC school drama Waterloo Road (2006–2009, 2023). She also appeared in the History miniseries Hatfields & McCoys.

Early life Griffiths grew up in Kildwick, North Yorkshire and attended South Craven School. She joined Stage 84, the Yorkshire School of Performing Arts aged 12.

Career In 2006, Griffiths began appearing in the BBC One school-based drama Waterloo Road from the first ever episode, broadcast on 9 March 2006, and made her last appearance in 2009. She's appeared opposite Nicholas Hoult as Alice in the BAFTA nominated television film Coming Down the Mountain; she has also appeared in multiple episodes of Casualty and Doctors and in Paradox in 2009 as Leah Holt. Since January 2010 she has appeared in two episodes of the Only Fools and Horses prequel Rock & Chips as Glenda and as Suzy in the Prime Suspect prequel Prime Suspect 1973 (also known as Prime Suspect: Tennison). She also starred opposite Kevin Costner and Bill Paxton in the multi Emmy Award winning mini-series Hatfields & McCoys portraying Alifair McCoy. In 2020, she appeared in another episode of the BBC soap opera Doctors as Ali Brinkshaw.

In 2023, Griffiths reprised her role as Chlo in Waterloo Road for one episode, in which the character was killed off.

In 2025, Griffiths served as the voice actor, playing a noblewoman Rosa Ruthard, a character in the video game Kingdom Come: Deliverance II.

Personal life Griffiths married Matthew Wardle in July 2022. The couple have a son (born 2024).

Filmography Year Title Role Notes 1999 Honky Sausages Honky Nipper Series 1: Episode 1 2006–2009, 2023 Waterloo Road Chlo Grainger Regular role (Season 1-4), Special Guest Starring (Season 11) 2007 Coming Down the Mountain Alice Television film 2007 Casualty Lucy Haninford Episode: "Close Encounters" 2008 After Work Drinks Michelle Short film 2008 Doctors Gemma Mason Episode: "The One" 2009 Paradox Leah Holt Series 1: Episode 5 2009 Casualty Ellie Graham Poplikova Episodes: "Dawn of the ED: Parts 1 & 2" 2010 Five Days Rowan Porter Episodes: "Day 1" and "Day 8" 2010 Doctors Kye Clifton Episode: "Something Evil" 2010 Rock & Chips Glenda Episodes: "Pilot" and "Five Gold Rings" 2012 Hatfields & McCoys Alifair McCoy Main role 2012 Casualty Sarah Samuels Episode: "Tough Love" 2016 Father Brown Rose Kane Episode: "The Brewer's Daughter" 2016 Casualty Livvy Minter Episode: "All I Want For Christmas Is You" 2017 Prime Suspect 1973 Suzy Series 1: Episode 1 2020 Doctors Ali Brinkshaw Episode: "Fire Proof"