Seth started her career as a guest relation executive at the Taj Mahal Hotel, Bombay. She began modelling at the same time "to make some pocket money", and was soon offered guest roles in a few television shows. Seth then hosted such successful shows as "First Day First Show" and "Junglee Jukebox" on Channel V. She said, in a later interview, that it was her time as a video jockey and television presenter on the channel "that firmly put me on the map."