Vivian Hoo Kah Mun (Chinese: 许家雯; pinyin: Xǔ Jiāwén; Jyutping: Heoi2 Gaa1 Man4; Pe̍h-ōe-jī: Khó͘ Ka-bûn; Pha̍k-fa-sṳ: Hí Kâ-vùn; born 19 March 1990) is a Malaysian former badminton player.

She is the elder sister of Hoo Pang Ron, who is also a Malaysian badminton player.

[1] Teamed-up with Woon Khe Wei in the women's doubles event, they reached top 10 BWF World Ranking.

Being a regular women's doubles player, Hoo has won the Commonwealth Games women's doubles event twice, first with her regular partner, Woon, at the 2014 Commonwealth Games in Glasgow and a second time with Chow Mei Kuan at the 2018 Commonwealth Games in Gold Coast.

[4] Vivian is the older sister of Hoo Pang Ron, who is also a badminton player.