Gwei Lun-mei (Chinese: 桂綸鎂; pinyin: Guì Lúnměi; Pe̍h-ōe-jī: Kùi Lûn-bí; born 25 December 1983) is a Taiwanese actress.

She started her acting career in 2002, with the film Blue Gate Crossing.

Gwei then appeared in a few more films before achieving wide recognition for the film Secret, directed by Jay Chou, in which Gwei played the character of Lu Hsiao-yu.

[2] In 2012, Gwei starred in Girlfriend, Boyfriend, a coming-of-age drama in which three teenagers navigate their attraction to one another – from their high school years into their adulthood.

[3] Gwei has been in a long-term relationship with actor and filmmaker Leon Dai since 2004.