Actor Nivin Pauly says his upcoming Malayalam drama "Hey Jude", in which he plays a "very challenging" character, will be a treat to watch.Releasing the first look poster of "Hey Jude" on Sunday, Nivin tweeted: "Presenting the official title design of 'Hey Jude', a wonderful tale of love, self-discovery, healing and transformation."The film will be directed by Shyamprasad, and it marks the Malayalam debut of actress Trisha Krishnan.Nivin wrote: "I play a unique and challenging character. I'm look forward to working with Shyamprasad sir, Trisha and some outstanding cast and crew."He told his fans that the film will be a "treat to watch this year."This year, apart from his Malayalam films, Nivin has three Tamil projects in his kitty, included the yet-untitled Tamil remake of Kannada thriller, "Ulidavaru Kandanthe".