(15 June 1843 – 4 September 1907) was a Norwegian composer and pianist who composed in the romantic period. He is best known for his Piano Concerto in A minor, for his incidental music to Henrik Ibsen's play Peer Gynt (which includes Morning Mood and In the Hall of the Mountain King), and for his collection of piano miniatures Lyric Pieces.

Grieg was born in Bergen, Norway on 15 June 1843. His ancestors were Scottish so the original family name was spelled "Greig". Grieg is renowned as a nationalist composer, drawing inspiration from Norwegian folk music. Early works include a symphony (which he later suppressed) and a piano sonata. He also wrote three sonatas for violin and piano and a cello sonata. His many short pieces for piano — often built on Norwegian folk tunes and dances — led some to call him the Chopin of the north.

Other well-known works are the Lyric Pieces (for piano), and the incidental music to Henrik Ibsen's play Peer Gynt. Despite In the Hall of the Mountain King being one of Grieg's most popular and enduring compositions, he himself did not care much for it. In a letter to a friend he wrote about the "infernal thing reek[ing] of cow-pies and provincialism." Grieg's popular Holberg Suite was originally written for the piano but later arranged for string orchestra.