Lu Rui En (born 29 January 1981), better known by her stage name Rui En (瑞恩), is a Singaporean actress contracted under MediaCorp and managed under Hype Records.
Rui En was talent-spotted after appearing in a SingTel hi!Card commercial as the "running girl" in 2001. She was offered a contract by Artiste Networks, a section of Hype Records. In 2002, Rui En debuted her acting career with her first drama, No Problem!. In late 2002, Rui En launched her music career in Taiwan, with the album Rui ∑n vol. 01, distributed by Alfa Music. Rui En released her second album in Singapore under Hype Records, titled United Nations, in late 2008.
Rui En first won the 'Best Actress Award' at the Singapore Star Awards 2011 with her role as a young widow in With You, the highest-rated Singapore drama in year 2010. Rui En was awarded the 'Best Actress in Leading Role' at the Asian Television Awards 2012, for her role as a tough cop in crime drama Unriddle 2. She went on to win her third acting award in the following year at the Star Awards 2013 for the same role in Unriddle 2, earning her second 'Best Actress Award' at Star Awards.