Bachchan, 74, who marked his Hollwyood debut with Di Caprio-starrer "The Great Gatsby", wished his co-star, "Happy Birthday" on Twitter and called him a "gentleman".
"Happy birthday Leonardo Di Caprio for the 11th...Colleague in 'GATSBY', a gentleman and a concerned 'climate change' actor...," he wrote.
Bachchan played the minor but important role of Meyer Wolfsheim in the 2013 film, a shady Jew who serves as a father figure to Di Caprio's character, the mysterious Jay Gatsby.