"Balasaheb Thackeray...my mind is filled with many memories. Tributes to the widely admired and respected personality on his birth anniversary," Modi tweeted.
"My tribute to Balasaheb Thackeray a true nationalist & a respected mass leader on his birth anniversary," he tweeted.
Bal Thackeray, an Indian politician who founded Shiv Sena, was born in Pune on 23 January, 1926.
Bal Thackeray died on 17 November, 2012.