Fox began dating actor Brian Austin Green in 2004, after meeting on the set of "Hope & Faith"; she was 18 years old, while he was 30. According to Fox, Green was initially hesitant to enter a relationship with her due to the age difference, stating, "I had to convince him that I was slightly more responsible and well-spoken and had other things to bring to the table besides being 18." They became engaged in November 2006. In February 2009, they ended their engagement.