Author Chetan Bhagat says it's a working birthday for actor Arjun Kapoor, who turned 31 on Sunday.
Arjun is currently busy shooting for "Half Girlfriend", a film based on Bhagat's novel of the same name.
"Working birthday for Arjun Kapoor as he braves the Delhi heat for 'Half Girlfriend'. On set, cake cutting pics," Bhagat tweeted and also posted a few images in which the actor is seen cutting a basketball-shaped cake on the set.
The film, directed by Mohit Suri, also features Shraddha Kapoor.
Scheduled for a worldwide release on April 28 next year, the movie will include songs sung by Rishi Rich and Shraddha herself.
Photos: Shraddha Kapoor, Kim Sharma at 'Haseena Parkar' screening
Mumbai to Goa train: First look at the glass-top Vistadome coach
Shuttler Ashwini Ponnappa keeps it short and sexy on social media
Photos: Narendra Modi, others at Marshal Arjan Singh's funeral
Photos: Sussanne Khan and Nimrat Kaur spotted at a spa in Juhu