Lucie is currently starring as Jenna in the West End production of Waitress. She competed on The X Factor UK in 2009, where she finished eighth.
Lucie then went on to play Cosette in the West End production of Les Misérables. She has played the role of Meat in the 2013 tour of We Will Rock You, Molly in the Chinese tour of Ghost the Musical, Elle Woods in Legally Blonde at Curve Leicester, Maureen Johnson in the UK tour of Rent and Holly in the UK Tour of The Wedding Singer. She represented the United Kingdom in the Eurovision Song Contest 2017 with the song "Never Give Up.