This is a multi-national, multicenter, double-blind, randomized, placebo-controlled study in participants with well-compensated NASH cirrhosis. Participants will be randomized 3:1 in a blinded manner to receive 80 mg resmetirom or matching placebo given orally once daily in the morning for the duration of the study (until the required number of Composite Clinical Outcome events are achieved). Composite Clinical Outcome events are defined as any of the following: all cause mortality, liver transplant, and significant hepatic events, including potential hepatic decompensation events (ascites, hepatic encephalopathy, or gastroesophageal variceal hemorrhage), and confirmed increase of Model for End-stage Liver Disease (MELD) score from \<12 to ≥15. The study comprises an up to 60-day screening period and an approximately 3-year treatment period.