Sonam was about to give the event a miss, but she really wanted to be a part of it and asked for a few hours off from her pre-booked schedule of "Players", according to a source close to the actress.
Sonam promised to be back on the shoot as soon as possible, and managed to balance her responsibilities to both her projects.
"Mausam" producer Sheetal Talwar of Vistaar Religare Film Fund says he was glad that Sonam could make it to the event.
"It was great that Sonam could make it for the launch, after all 'Mausam' is a love story and would have truly been incomplete without her, " Talwar said in a statement.
"Mausam", which is actor Pankaj Kapoor's directorial debut and stars Shahid Kapoor in lead role, will release Sep 16.