Known for bankrolling popular Kannada films such as "Varsha", "Super" and "Sundaranga Jaana", Rockline Venkatesh is making his Tamil acting debut with filmmaker Bala's upcoming crime-thriller "Nachiyaar"."Venkatesh has been roped in for a pivotal role in the film. He doesn't play the antagonist but his character feature throughout. Although surprised that he was even approached with the offer, he jumped at the opportunity because he's a fan of Bala's work," a source from the film's unit told IANS.Last seen in a minor role in Ram Gopal Varma's Kannada thriller "Killing Veerappan", Venkatesh will join the sets from this month end."The principal shooting commenced from Wednesday. The makers are aiming for September release so they have to complete the film in the next three months," the source said.Also starring Jyotika in a khaki-clad character and G.V. Prakash Kumar in a negative role, the film has music by Ilayaraja.Bala is producing the film under his home banner B Studios.