Guo Pei (Chinese: 郭培, Mandarin pronunciation: [ku̯ó pʰěɪ̯], born 1967) is a Chinese fashion designer. She is best known for designing dresses for Chinese celebrities, and in America for Rihanna's trailing yellow gown at the 2015 Met Ball. Guo is the first born-and-raised Asian designer to be invited to become a guest member of the Chambre Syndicale de la Haute Couture. In 2016, Time Magazine listed her as one of the World's 100 Most Influential People.
Guo was born in Beijing in 1967. Her father was a senior official and her mother a kindergarten teacher. In 1986, she graduated after studying fashion design at the Beijing Second Light Industry School. Three years later, Guo became chief designer at one of Beijing's first independently owned clothing companies in the post-Cultural Revolution era. She left the company in 1997 to form her own fashion brand.
Based in Beijing, Guo's fashion style borrows heavily from traditional Chinese imperial court design. Many pieces in her collection involve silk, fur and embroidery work. Guo's work includes those at the 2008 Summer Olympics and the annual CCTV New Year's Gala. She designed the dress worn by Song Zuying during her duet with Plácido Domingo at the 2008 Summer Olympics closing ceremony. The dress took two weeks to create, with 200,000 Swarovski crystals hand-sewn into the white gown.