His 2002 debut as a mentally challenged youth in Thulluvadho Ilamai established Dhanush's serious dramatic chops. But the young actor, producer and lyricist had many more surprises up his sleeve—he's taken over Tamil and Kollywood films, made the crossover to Bollywood with the romantic comedy Raanjhanaa in 2013, and crushed the pop charts as a singer and lyricist with the phenomenon “Why This Kolaveri Di?"