Mumbai, Nov 28 (IANS) Superstar Shah Rukh Khan says author Paulo Coelho is kind and generous. Coelho, who has authored books like "Eleven Minutes", "Brida" and "The Alchemist", took to Twitter to share a link about SRK. He also wrote that the actor is the greatest movie star in the world. The "Don" star replied by thanking Coelho and calling him kind. "Thank you my friend Paulo Coelho. You are kind and generous with your love," Shah Rukh tweeted on Sunday night. Shah Rukh had previously gifted the author a set of his films, including "Asoka", "Chak De! India" and "Om Shanti Om". On the work front, Shah Rukh, currently praised for his act in Gauri Shinde's "Dear Zindagi", will next be seen in "Raees".