Sonia continued to explore romance in various forms throughout her career. She starred opposite Vijay in Madhurey (2004) and with Silambarasan in Kovil (2004), both films featuring her as a woman deeply in love. She also won the ITFA Best Actress Award for her role in the romantic drama Oru Kalluriyin Kathai (2005). After a break from acting following her marriage, she made a successful comeback with Vaanam (2011), and has since continued to appear in films across Tamil, Telugu, Malayalam, and Kannada cinema.

: Sonia plays Aishwarya, a wealthy Brahmin girl who falls in love with a lower-caste mechanic, Murugan (Bharath). They elope, and society destroys them.