Advani's mother Rekha died on Saturday.
Apart from Karan and Abhishek, filmmaker Sudhir Mishra, T-Series head honcho Bhushan Kumar, actors Manoj Bajpayee and Diana Penty were seen at the funeral.
Abhishek hugged and consoled Advani, who is known for helming films like "Kal Ho Naa Ho", "Salaam-E-Ishq", "Chandni Chowk To China" and "D-Day".