Born in Hillerød on 11 November 1887, Lilly Camradt was the daughter of the pharmacist Johannes Ludvig Camradt (1845–1928) and his wife Charlotte Johanne née Kruuse (1849–1932). In 1910 she married the actor Johan Frederik (Fritz) Wendt Lamprecht (1883–1941) but the marriage was later dissolved. After training in voice under Elisabeth Dons and in drama under Holger Hofman, she entered the Royal Theatre School in 1909. Shortly afterwards, she was given a minor stage role as a singing page in Oehlenschläger's Correggio.[1]
In 1911, she made her official début singing the title role in Hartmann's opera Liden Kirsten, a role she frequently sang, including once at an outdoor performance in Jægersborg Dyrehave.[1] She became one of the theatre's most active performers, singing Nedda in Leoncavallo's Pagliacci, Sophie in Der Rosenkavalier, Aase in Drot og Marsk and Rosina in The Barber of Seville. She was particularly effective both as an actress and as a singer as Anuna in Richard Strauss's Salome. Lambrecht was the first in Denmark to perform the role and was also the first to perform Marie in Alban Berg's Wozzeck, on this occasion at a concert.[1][2] She retired from the Royal Theatre in July 1931 but in September 1933 performed Margrethe in Faust three times as a guest.[3]