Ada Choi Siu-fan (Chinese: 蔡少芬; born 17 September 1973) is a Hong Kong actress best known for her work, as the Empress in the Chinese television series Empresses in the Palace (甄嬛傳), and to a lesser extent, for her film work.
Along with Maggie Cheung Ho-yee, Kenix Kwok, Flora Chan and Jessica Hsuan, Choi is known as one of the Top 5 "Fa Dans" (term used for actresses with high popularity) of TVB from the mid-1990s to mid-2000s.
In 2009, she starred in Rebellion as a triad gang leader who chain-smokes and curses, a different type of role for Ada.
In recent years, she has participated in numerous variety and reality shows as a regular cast member including Up Idol (2015), Run for Time (2015), My Dearest Ladies (2019) and Viva La Romance (2020).
He was her co-star in a number of Zhouyi Media television productions including The Legend of Magic Mirror (2003) and Eight Charts (2005).