Nixon is known for her role as Sophy Hutton in the BBC One period drama Cranford, and appearances in various films such as Wild Child and Angus, Thongs and Perfect Snogging.
[3][4][5] After high school, Nixon trained at the Royal Welsh College of Music & Drama in Cardiff alongside Tom Cullen and Aneurin Barnard.
[8] Nixon appeared in Easy Virtue[9] and played one of the leads in Cherrybomb opposite Rupert Grint and Robert Sheehan, before starring in Black Death.
In 2011, Nixon played Josie in the Channel 4 TV comedy-drama series Fresh Meat, and starred alongside Michael Sheen, Andrea Riseborough and Iwan Rheon in Resistance, an adaptation of an Owen Sheers novel, which was released in the UK in November 2011.
Nixon appeared in the musical film Hunky Dory, which is set in 1976 Swansea, with Minnie Driver, Aneurin Barnard and George MacKay, directed by Marc Evans.
[15] In June 2013, Nixon starred in "Greenshaw's Folly" in the sixth series of ITV's Agatha Christie's Marple, with Matt Willis, Fiona Shaw, Julia Sawalha, Vic Reeves and Martin Compston.