Lang Lang (Chinese: 郎朗; pinyin: Láng Lǎng; born 14 June 1982) is a Chinese pianist who has performed with major orchestras around the world and appeared at many leading concert halls. Active since the 1990s, he was the first Chinese pianist to be engaged by the Berlin Philharmonic, the Vienna Philharmonic and many of the top American orchestras. In 2000, a Chicago Tribune music critic called him "the biggest, most exciting young keyboard talent I have encountered in many a year of attending piano recitals."

He was also a judge on the first two series of the British music competition television series The Piano.

Lang Lang was born in Shenyang, China, in 1982, to a family of the Manchu Niohuru clan. His father Lang Guoren is a musician, playing the erhu. Both his father and mother, also a musician, were displaced to work on rice farms in the country during the Cultural Revolution, before Lang was born.

The Tom and Jerry episode The Cat Concerto, which features Franz Liszt's Hungarian Rhapsody No. 2., motivated two-year-old Lang to learn the piano. He started lessons with Zhu Yafen at age three, won first place at the Shenyang Piano Competition and performed his first public recital when he was five.

When Lang was nine, he was expelled from his piano tutor's studio for "lack of talent". Lang has stated that upon learning of this, his father flew into a rage and told Lang that he "shouldn't live any more", ordering him to jump off the balcony of their 11th floor family apartment. Another music teacher at his state school noticed Lang and asked him to play the second movement of Mozart's Piano Sonata No. 10, which reminded Lang of his love for the instrument. Lang later studied under Zhao Ping-Guo at Beijing's Central Conservatory of Music.

Lang won the Xinghai National Piano Competition in Beijing in 1993 and first prize for outstanding artistic performance at the International Competition for Young Pianists in Ettlingen, Germany, in 1994. In 1995, Lang played the Chopin études at the Beijing Concert Hall, won the International Tchaikovsky Competition for Young Musicians in Japan, and performed as soloist with the Moscow Philharmonic Orchestra. Fourteen-year-old Lang was a featured soloist for the China National Symphony's inaugural concert in September 1996, then General Secretary of the Chinese Communist Party Jiang Zemin met Lang after this performance.

Lang and his father moved to the United States in 1997, so Lang could pursue studies with Gary Graffman at the Curtis Institute of Music in Philadelphia.

Lang has been noted by musicians and critics around the world. The conductor Jahja Ling remarked: "Lang Lang is special because of his total mastery of the piano... He has the flair and great communicative power." National Public Radio's Morning Edition remarked: "Lang Lang has conquered the classical world with dazzling technique and charisma." It is often noted that Lang successfully straddles two worlds, classical prodigy and rock-like "superstar", a phenomenon summed up by The Times (London) journalist Emma Pomfret, who wrote, "I can think of no other classical artist who has achieved Lang Lang's broad appeal without dumbing down."