Rajesh Khanna and Twinkle Khanna share a birthday – December 29th. So there’s always reason for a double celebration on this day in the Kumar-Khanna household. Actor Akshay Kumar, husband to Twinkle and son-in-law to Rajesh Khanna, has ensured that 29th remains a day to remember for the birthday boy and girl. The generous actor took the entire family to Goa, and celebrated Rajesh Khanna’s birthday in the land of sand and surf. If sources are to be believed, there were about 25 guests – family and close friends – in attendance.