Actress Huma Qureshi, who will star alongside Mammootty in the forthcoming film “White”, says working with the Malayalam superstar has been a great experience for her.“White” will mark Huma's debut in the Malayalam cinema.While posting a photograph with the actor on Twitter on Sunday, Huma wrote: “Working with Mammootty has been a great experience.”Directed by Uday Ananthan, “White” will release on July 29.