The Borrower Arrietty (借りぐらしのアリエッティ Karigurashi no Arietti) is a 2010 Japanese animated fantasy film produced by Japanese animation house Studio Ghibli, based on the fantasy novel The Borrowers by Mary Norton.

The film was released on July 17, 2010 in Japan and marked the directorial debut of Studio Ghibli animator Hiromasa Yonebayashi, who was the youngest person to direct a film for Ghibli. Ghibli founder Hayao Miyazaki was supervising the production as a developing planner. The voice actors for the main characters were announced on April 12, 2010.

The music for the film was composed by French (Bretonne) singer Cécile Corbel, who has released the main theme entitled "Arrietty's Song", in Japanese, English and French. Corbel came to the attention of Ghibli filmmakers when she sent them a fan letter showing her appreciation of their films, and after hearing a CD of her music she sent to them, they thought she should compose the music for their next movie.

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