Karthi, one of Tamil cinema's most versatile actors, has delivered memorable performances throughout his career—but not every film has been a winner. From the critically acclaimed *Paruthiveeran* (2007) to recent blockbusters like *Kaithi* (2019) and the *Ponniyin Selvan* duology, his filmography spans diverse genres. However, some ventures like *Alex Pandian* (2013), *All in All Azhagu Raja* (2013), and *Saguni* (2012) failed to resonate with audiences and critics alike. This ranking explores Karthi's less successful outings, including commercial misfires like *Siruthai* (2011) and experimental risks such as *Kaashmora* (2016). Whether examining formulaic entertainers that missed the mark or ambitious projects that didn't quite deliver, this list sparks debate about which films truly represent the actor's weakest work in an otherwise impressive career.