Shiva and his friends fall for Sowmya, who has just moved into their locality. They are forced into a competition to win over the girl.
| Actor | Role |
|---|---|
 SanthanamKaalkattu 'KK' Kaliyaperumal | Kaalkattu 'KK' Kaliyaperumal |
 Powerstar SrinivasanPower Kumar | Power Kumar |
 SethuShiva | Shiva |
 Vishakha SinghSoumya | Soumya |
 VTV GaneshKrishnamoorthi | Krishnamoorthi |
 Kovai SaralaSowmiya's Aunt | Sowmiya's Aunt |
 Pattimandram RajaShiva's Father | Shiva's Father |
 Vanitha KrishnachandranShiva's Mother | Shiva's Mother |
 DevadarshiniShiva & Sowmiya's Neighbour | Shiva & Sowmiya's Neighbour |
| VVithusanKoundan | Koundan |
 Sivashankar MasterSowmiya's Dad | Sowmiya's Dad |
 SilambarasanSelf | Self |
| GGaneshkarAuto Driver | Auto Driver |
 SwaminathanShiva & Sowmiya's Neighbour | Shiva & Sowmiya's Neighbour |
 Lollu Sabha ManoharAd Film Actor | Ad Film Actor |
 Stunt SilvaKolaveri David | Kolaveri David |
| AAshwanth ThilakSpecial Appearance in "Hey Unnathan" Song | Special Appearance in "Hey Unnathan" Song |
| BBalasubramaniemSpecial Appearance in "Hey Unnathan" Song | Special Appearance in "Hey Unnathan" Song |
 Gautham Vasudev MenonSelf | Self |