I've seen a couple dance clips online of this famous song and often a jathi would be included in the beginning. However none of the jathis seem to fit with the thalam (ata).
Like this one, by Hema Malini: http://www.youtube.com/watch?v=DHQBn6Scbp8 The Jathi starts around 1:15. Am I doing thalam wrong or is it a different thalam?