Jonathan Majors' trial on domestic violence charges is underway. Here's what to know.

Actor Jonathan Majors' trial on domestic violence charges began Wednesday in New York City, eight months after the alleged incident took place. 

He is accused of assaulting his ex-girlfriend, Grace Jabbari, in March — but Majors claims that Jabbari attacked him. 

The alleged assault made national headlines and the misdemeanor case spiraled into a feud fought in the press as prosecutors and the defense traded accusations about what happened and argued publicly about the charges. Jabbari was arrested, then released, and Majors' star — which had quickly ascended in Hollywood in recent years — began to fall.