Lyudmila Lyubomirova Dyakovska (Bulgarian: Людмила Любомирова Дяковска; born 2 April 1976), better known as Lucy Diakovska (Bulgarian: Люси Дяковска, romanized: Lyusi Dyakovska), is a Bulgarian singer and television personality. She rose to prominence as one of the founding members of the all-female pop band No Angels, the "biggest-selling German girlband to date", according to the German media.

After a series of commercially successful releases with the group, Diakovska released two singles and her solo album Lucylicious under her same-titled stage name in 2005. In 2008, she became part of the jury on reality shows Music Idol and Starmania, the Bulgarian and Austrian version of the Idol series respectively, and later joined the jury the German version of Popstars in 2012.