Author Chetan Bhagat says that Arjun Kapoor, who’s going to turn 31 on Sunday, is going to be working on his birthday. 

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',” Bhagat tweeted. “On set, cake cutting pics."

The “2 States” author posted a few images in which Arjun Kapoor is seen cutting a cake in the shape of a basketball on the set.

“Half Girlfriend” is based on the book by the same name, written by Chetan Bhagat.

The film also stars Shraddha Kapoor and is directed by Mohit Suri.

The film is set to release on 28^th April of next year and will also feature songs sung by Rishi Rich and Shraddha herself.