Hum Tum is a 2004 romantic comedy film starring Saif Ali Khan and Rani Mukherjee in lead roles. The main highlight of the movie was the cartoon version which was screened during the movie. After bumping and fighting each other, a boy and girl part ways but in good terms. They meet after many years and the boy discovers that she's widowed. It's upto the boy to bring happiness in her face.