Actor R. Madhavan, who reportedly lost 15 kg for his role as a boxer in "Laal", says he has now undergone a dental transformation for a movie, whose name he has not disclosed.

"OF all da things I have undergone for da sake of this FILM, da current dental transformation is da worst - can't speak can't eat - crew ecstatic," Madhavan posted on Twitter.

His post prompted his fans to question him about the movie he was referring to, but the actor said: "No Folks. I can't talk anything about this film Now. So can't do interviews. So sawee. lot invested. will do at right time n place."