Star-crossed is an adjective that is often used to describe lovers whose relationship is doomed or destined to fail. However, there are several antonyms for the word star-crossed that can be used to describe successful and fortunate relationships. Firstly, auspicious is an antonym that suggests a positive beginning and a bright future. Serendipitous is another antonym, which suggests that the relationship was unexpected and caused by chance, but it turned out to be a happy one. Luminous is also an antonym of star-crossed, which implies a relationship that is radiant and full of light. Joyous and fortuitous are other antonyms that indicate happy and successful relationships.