Abhishek Bachchan may have been greeted only with a bouquet by his fiancee Aishwarya Rai on his 31st birthday, but his father Amitabh Bachchan surprised him with a Rs 1.7 crore white Bentley car as a gift.

Aishwarya, who was unable to go to Bikaner to usher in the birthday, was present at the Chhatrapati Shivaji airport to greet him on his arrival in the city.

Abhishek later went for a drive in the new car with his lady love and soon after drove back to the Bachchan residence in suburban Juhu.

Aishwarya's gift, if any besides the bouquet, remains a guarded secret.

"Her gift to Abhishek is too personal and confidential," Aishwarya's secretary Hari Singh said.

Earlier, Amitabh Bachchan along with Samajwadi Party leader Amar Singh flew to Junagarh Fort in Rajasthan where Abhishek was shooting his forthcoming film Drona, to cut the birthday cake at midnight.

Jaya Bachchan and Aishwarya could not join them there but were able to meet Abhishek as he returned to the city by evening.

When asked about why Aishwarya did not join Abhishek at Junagarh on the 'D' day, Singh refused to comment saying it was a personal matter.