Complex sentence: While in IIT B, he had starred in a feature film Deja Vu directed and written by a fellow IITian, Anshul Singhal, inspired by a play of the same name that they had worked together in.
Split into simpler sentences: While in IIT-B, he had starred in a feature film Deja Vu, directed and written by a fellow IITian, Anshul Singhal. This was inspired by a play of the same name that they had earlier worked together in.