The first look was launched by Shah Rukh, director Karan Johar and Kajol at the JW Marriott hotel. The promos were aired at 10 p.m. across 70 countries.
"It is one of the nicest love stories I have participated (in), " Shah Rukh said while the promo was unveiled.
The film brings Karan, Shah Rukh and Kajol together for a film after the hit "Kabhie Khushi Kabhi Gham" eight years ago.
The story revolves around Rizwan Khan (Shah Rukh), a Muslim from Mumbai who suffers from Asperger syndrome, a form of autism.
Rizwan marries a Hindu single mother Mandira (Kajol) in San Francisco. But post 9/11, Rizwan is detained by authorities at Los Angeles International Airport, mistaking his disability for "suspicious" behaviour.
The film is slated to release Feb 12, 2010.