Xiang Yun and Edmund Chen
Now, this one was a quickie.
Edmund Chen met Xiang Yun in the 1989 铁警雄风, a drama about traffic police. They ended up dating each other, and got married within just 3 months, in 1990.
Their marriage created some sort of a media furore, as celebrities getting married to each other was practically unheard of, back then!