The 29-year-old will be seen with Parineeti Chopra in Vinil Mathew-directed "Hasee Toh Phasee", which releases Friday.
"Sidharth is fabulous in the film and the kind of restraint and focus he has shown in 'Hasee Toh Phasee' is impressive. He is so real and believable to the extent that I did not expect it from him," Kashyap said in a statement.
According to a source, the "Gangs of Wasseypur" director is writing a film keeping Sidharth in mind.
"While SOTY (Student Of The Year) established Sidharth's fan base, 'Hasee Toh Phasee' is here to introduce Sidharth Malhotra-the actor. Just two films old, the actor has managed to impress some of the biggest names in the industry, the latest being Anurag Kashyap who is very impressed with Sidharth and is keen on writing a film keeping him in mind," said a source.