Rosamund Kwan Chi Lam (born Kwan Kar Wai on 24 September 1962) is a former Hong Kong actress, known for her on-screen pairing with Andy Lau in dramatic films such as Casino Raiders and The Wesley's Mysterious File, and for her role opposite Jet Li as Thirteenth Aunt in the Once Upon a Time in China film series.

"Sup Sum Yee" ("Shi San Yi" in Mandarin, "13th Aunt" in English) throughout the Once Upon a Time in China film series.

[2] The majority of her acting roles were in dramatic films, notably with Andy Lau in Casino Raiders and The Wesley's Mysterious File.

She is known internationally for her roles in Hong Kong action films, alongside a variety of major stars of the genre.

[4] Kwan was married to financial service mogul Chris Wong Kwok Sing in 1981, which lasted for nine months; they split in 1982.