As Narayan Shankar, the strict principal of an all-boys college, Gurukul, the 78-year-old veteran had transitioned from playing a hero to characters his age.
Bachchan took to Twitter and posted a montage of the film, along with his popular dialogue, "Parampara, Pratishtha, Anushasan".
"'Mohabbatein' is special for many reasons.Twenty years of this beautiful love story, a roller coaster of emotions. Eternally grateful for all the love you continue to shower," he tweeted.