India, Jan. 13 -- Actor Hrithik Roshan marked his 52nd birthday, on January 10, with girlfriend, actor Saba Azad along with family and friends. His ex-wife Sussanne Khan and their sons, Hrehaan and Hridhaan, also joined the celebrations. Sharing the snaps from his yacht party, the actor wrote: "Thank you world, my family, friends, fans...to everyone who has taken the effort to message me, post about me, called me...." HTC...