Mikhail Nikolaevich Baryshnikov (Russian: Михаил Николаевич Барышников) (born January 27, 1948) is a Soviet-born Russian American dancer, choreographer, and actor, often cited alongside Vaslav Nijinsky and Rudolf Nureyev as one of the greatest ballet dancers of the 20th century. After a promising start in the Kirov Ballet in Leningrad, he defected to Canada in 1974 for more opportunities in western dance. After freelancing with many companies, he joined the New York City Ballet as a principal dancer to learn George Balanchine's style of movement. He then moved to dance and later became artistic director with the American Ballet Theatre, also in New York.

Baryshnikov has spearheaded many of his own artistic projects and has been associated in particular with promoting modern dance, premiering dozens of new works, including many of his own. His success as a dramatic actor on stage, cinema and television has helped him become probably the most widely recognized contemporary ballet dancer.

Born in Riga, now in independent Latvia, Baryshnikov began his ballet studies there in 1960. In 1964, he entered the Vaganova School, in what was then Leningrad (now again St. Petersburg). Baryshnikov soon won the top prize in the junior division of the International Varna Competition. He joined the Kirov Ballet and made his debut at the Mariinsky Theater in 1967, dancing the “Peasant” pas de deux in Giselle. Recognizing Baryshnikov's talent, in particular the strength of his stage presence and purity of his classical technique, several Soviet choreographers, including Oleg Vinogradov, Konstantin Sergeyev, Igor Tchernichov, and Leonid Jakobson, choreographed ballets for him. Baryshnikov made signature roles of Jakobson's 1969 virtuosic Vestris along with an intensely emotional Albrecht in Giselle. While still in the Soviet Union, he was called by New York Times critic Clive Barnes "the most perfect dancer I have ever seen".