Louisa Claire Lytton ( born 7 February 1989 ) is an English actress and dancer . She is known for her television roles as Ruby Allen in '' EastEnders '' ( 2005 – 06 , 2018 – ) , and PC Beth Green in '' The Bill '' ( 2007 – 09 ) . She also finished fourth in series 4 of '' Strictly Come Dancing '' in 2006 and represented the UK at the Eurovision Dance Contest 2008 , finishing ninth . Her theatre credits include playing Betty Rizzo in the 2017 UK touring production of the musical '' Grease ''
Eurovision Dance Contest 2008
Eurovision Dance Contest 2008
Louisa Lytton