Samantha has turned a year old today (April 28). But it was working day for her. At present, she is shooting for a Tamil movie titled Kathi starring Vijay as hero.The film is being directed by A. R Murugadoss.So the film’s unit brought it in huge cake and made her cut the cake and celebrate with the unit members. “Great start to hopefully a great year ahead,” said the birthday girl. Samantha is Tollywood’s number one heroine.