Director: Santhosh P. Jayakumar
Cast: Arya as Rajinikanth, Sayyeshaa Saigal as Vandhana, Sampath Raj as Sathyamoorthy (Vandhana's Father), Aadukalam Naren as Ramanathan (Rajinikanth's Father), Lijeesh as Inspector Ajay, and Uma Padmanabhan as Lakshmi Ramanathan (Rajinikanth's Mother).
A baby boy was born in a theatre screening Dharmathin Thalaivan starring superstar Rajinikanth while his mother was watching that film, and like one of Rajinikanth’s characters in that film, has a forgetful nature. The boy is named Rajinikanth as a tribute to the superstar as ht boy was born when his movie was screened. The film also makes a reference to a scene in the said Rajini movie by introducing the hero's character showing him wearing underwear.
This condition of Rajini is a constant source of embarrassment to his parents. They cannot find a suitable match for him despite him being an eligible bachelor. One prospective girl's father, Sathyamoorthy even insults Rajini because of this as he has quite quickly lost his attention and forgot the appoint with Sathyamoorthy.
But as fate would have it, Rajini ends up falling in love with Sathyamoorthy's daughter, Vandhana. But the girl is unaware of Rajini's forgetfulness. He woos her by helping her and her friends, and evading his forgetful nature when he was in her presence. How long can he continue with this facade, especially with Ajay, a cop who wants to marry Vandhana, trying to expose him? One day, the time comes for him to meet his lady love's father. The comedy of errors that follow this and how he gets his girl's hand in marriage form the rest of the story.
Ghajinikanth fared poorly at the box office. But the comedy setpieces and senior actors performances are praised to an extent. The critical consensus is that Ghajinikanth failed to meet its source material's authentic humor (The movie is the official remake of Telugu blockbuster Bhale Bhale Magaadivoy). The box office performance of Ghajinikanth is recorded at the box office as average.