Synopsis:
Rizwan Khan, a Muslim from the Borivali section of Mumbai, suffers from Asperger syndrome (a form of high-functioning autism complicating socialization). The adult Rizwan marries a Hindu single mother, Mandira, in San Francisco. After 9/11, Rizwan is detained by authorities at LAX who mistake his disability for “suspicious” behavior. Following his arrest, he meets Radha, a therapist who helps him deal with his situation and his affliction. Rizwan then begins a journey to meet US President Obama to clear his name.
Other Info:

My Name Is Khan

• Director: Karan Johar

• Actors:
  Rizvan Khan

  Shah Rukh Khan
  Mandira Khan

  Kajol
  Sarah Garrick (as Katie Amanda Keane)

  Katie A. Keane
  Reese Garrick

  Kenton Duty
  Detective Garcia

  Benny Nieves
  President Barack Obama (as Christopher B Duncan)

  Christopher B. Duncan
  Zakir Khan

  Jimmy Shergill
  Hasina Khan

  Sonya Jehan
  Bobby Ahuja

  Parvin Dabas
  Rajesh 'Raj' Burman

  Arjun Mathur

• Writers:
  Shibani Bathija

   
  Shibani Bathija

   
  Niranjan Iyengar

   

• Source:    IMDb's page for this movie