The 71-year-old, who is currently shooting for "Bhootnath Returns", is "amazed" by the performances in the Oscar nominated movie.
"'The Wolf of Wall Street' keeps me awake till now, and the amazement of the film and its performances, natural to the extent of an unbelievable fact, true to its text and construct," Amitabh posted on his blog in the wee hours of Thursday.
"Good I took in the recommendation of Ranbir Kapoor, who was on the set with us today (Wednesday)," he wrote.
Ranbir will be seen in a cameo in "Bhootnath Returns".