Watch My Best Friend's Wedding full movie online Movies123. Watch My Best Friend's Wedding 123movies online for free. My Best Friend's Wedding 123Movies: Growing up together, Lin Ran is not only Gu Jia's best friend but whom taken as a backup boyfriend unconsciously, until one day Lin Ran announces his engagement with the naive and rich Meng Yi-Xuan, and Gu Jia determines to win him back.