Besides being the role of female actress Juliette Lewis in the Oliver Stone film "Natural Born Killers" there is more than one artist with this name (see links in the Wiki sources):
These are photos from concerts where Mallory Knox played, so they may be of other bands that played the concert as well.
Slam Dunk Festival (North) May 26, 2024 Leeds, England, United Kingdom Uploaded by Russell Kehely
Slam Dunk Festival 2024 May 26, 2024 Leeds, England, United Kingdom Uploaded by Mark Hutchinson
Slam Dunk Festival (South) May 25, 2024 Hatfield, England, United Kingdom Uploaded by Russell Kehely
Slam Dunk Festival 2024 May 25, 2024 London, England, United Kingdom Uploaded by Unusual Chris
2000 Trees 2018 Jul 12 - 14, 2018 Cheltenham, England, United Kingdom Uploaded by Blossom Baphomet
Reading Festival 2017 Aug 25, 2017 Reading, England, United Kingdom Uploaded by Tom.M
2000 Trees 2017 Jul 6 - 8, 2017 Cheltenham, England, United Kingdom Uploaded by Blossom Baphomet
Poster
Firenze Rocks Festival 2017 Jun 23 - 25, 2017 Florence, Tuscany, Italy Uploaded by Nurz
Butserfest Sep 10, 2016 Petersfield Uploaded by Jwicks