Actress Aishwarya Rai made her acting debut in Mani Ratnam's Tamil film, Iruvar (1997) with Mohanlal, and was introduced to Bollywood in the film, Aur Pyaar Ho Gaya opposite Bobby Deol, which also released that year; the film didn't do well at the box office.
source:en.wikipedia.org
source:en.wikipedia.org