The 30-year-old actor, who had landed on May 4 at the Chhatrapati Shivaji international airport on a British Airways flight from London, walked away with branded goods in his luggage that required to be declared before the Customs authorities.
After the luggage was checked, branded goods such as perfumes, clothes and footwears worth about Rs one lakh were found.
Ranbir was detained for nearly 40 minutes and after the enquiry and verification of goods, he was fined about Rs 60,000 and let off.
"I did made a mistake but I also paid a price for it. I made a mistake of not declaring duty free goods. It was my responsibility to do so. And hence I was stopped and had to pay the fine," Ranbir told reporters here.
Meanwhile, he looked quite excited about the promotions of his upcoming film 'Yeh Jawaani Hai Deewani'.
For this film, Ranbir got an opportunity to shake a leg with dancing diva Madhuri Dixit for a special song 'Ghagra'.
"It feels great to work with someone of her stature. I have loved working with all actresses right from Zohara Sehgal to Madhuri to Deepika and Katrina," Ranbir said.
Ranbir added, "I like both Deepika (Padukone) and Katrina Kaif's smile. Both are beautiful. I have had great fun working witih them."