What actors and actresses appeared in Hai Kaun Woh - 1999?

The film you are referring to is likely "Kaun?" (1999), not "Hai Kaun Woh".

Here are the main actors and actresses who appeared in the film "Kaun?":

* Urmila Matondkar as Priya

* Saif Ali Khan as Sunny

* Johnny Lever as a police officer

* Sushma Seth as the old woman

* Anupam Kher as a neighbour

* Manoj Bajpayee as a suspicious character

* Ravi Baswani as a doctor

Please note that the film's title is "Kaun?", not "Hai Kaun Woh".