The Delhi girl is busy shooting for director Howard Rosemeyer's film "Jia Aur Jia".
"Happy Deepawali to all! May this be a luminous new start to all that is auspicious and new ... Blessed be," Richa tweeted.
"Homesick and how... first Diwali on foreign shores... Sigh," she added.
The actress was recently seen in a cameo in television series "24".