^ "Happy Days - All Songs - Download or Listen Free - Saavn".^ " 'Happy Days' Review: A Nostalgic Retreat".Archived from the original on 23 February 2008. Archived from the original on 20 October 2007. ^ Box Office Collections of Hit Films of Tollywood- 2007.^ Idle Brain Interview with Sekhar Kammula.^ a b "Nandi awards 2007 announced – Telugu cinema news".
He sent his photograph by e-mail in response to advertisement and subsequently sent a video clip of himself enacting certain scenes along with a song via Google Video. Varun Sandesh did not audition for his role. The main lead of the film was selected using the internet without any direct audition. He had to cast Tamannaah as a suitable actress was not found.
Sekhar Kammula held a talent search at Big FM and and managed to select seven of the eight lead actors. Kamalinee Mukherjee as Shreya Madam (Guest Appearance).Varun Sandesh as Chandrashekar "Chandu".