The Lithuanian Liberty League or LLL (Lithuanian: Lietuvos laisvės lyga) was a dissident organization in the Lithuanian Soviet Socialist Republic and a political party in independent Republic of Lithuania. Established as an underground resistance group in 1978, LLL was headed by Antanas Terleckas. Pro-independence LLL published anti-Soviet literature and organized protest rallies. While it enjoyed limited popularity in 1987–1989, it grew increasingly irrelevant after the independence declaration in 1990. It registered as a political party in November 1995 and participated in parliamentary elections without gaining any seats in the Seimas.
On 23 August 1987, the 48th anniversary of the Molotov–Ribbentrop Pact, LLL organized the first anti-Soviet rally that was not forcibly dispersed by the police. The event tested the limits of glastnost and other liberal Soviet reforms and is often cited as one of the first signs of the Lithuanian independence movement. The rally took place near St. Anne's Church, Vilnius and attracted some 500–1,000 participants. While the police monitored the event and reportedly KGB agents took pictures and video of the protesters, the speakers were not interrupted. Demands raised at the event included publication of the Pact, rehabilitation of those deported into Siberia, and greater rights to the Catholic Church.TASS, the official Soviet news agency, labeled the event as a "hate rally" and participants as "aggressive extremists." Other major rallies took place on February 16, 1988, the anniversary of the Act of Independence of Lithuania, and on other sensitive dates from the history of Lithuania.