Born in the western suburbs of Adelaide, he is the son of former South Australian politician George Weatherill.
Weatherill attended Henley High School. He later studied at the University of Adelaide, graduating with degrees in law and economics. During his university days he had a relationship with current federal minister Penny Wong.
Working life
With fellow Adelaide lawyer Stephen Lieschke, he established industrial law firm Lieschke Weatherill in 1995 where he practiced law until his election to Parliament.