Rakul Preet Singh has joined the cast of Ayushmann Khurrana-starrer ‘Doctor G’. Rakul will be seen romancing Ayushmann in the film. The actress will be seen playing the role of Dr Fatima, a medical student in the campus comedy drama. Directed by Anubhuti Kashyap, the film will see Ayushmann in the role of Dr Uday Gupta.