Trace Cyrus and Brenda Song have sparked rumours their engagement is back on.

The 24-year-old rock musician, who is Miley Cyrus' older brother, and the former Disney star, 25, called off their engagement last June, blaming their busy work schedules, but the 'Social Network' actress was spotted wearing a diamond ring on her left hand finger on Thursday (13.06.13), amid rumours they recently reignited their romance.

The duo was also photographed together at a 7-Eleven in Studio City, California, on Tuesday (11.06.13) renting a movie and buying snacks at 1 a.m.

The brunette beauty, who previously starred on 'The Suite Life of Zack & Cody' and most recently on 'New Girl' and 'Scandal,' hinted that the couple reconciled on Twitter on Friday (14.06.13), writing: ''Sometimes good things fall apart, so that better things can fall together.''

She also posted: ''Don't give up on someone you can't go a full day without thinking about.''

The couple announced their engagement in October 2011 and released a statement that they had split last summer just days after the former Metro Station rocker's sister Miley, 20, revealed she is engaged to Australian actor Liam Hemsworth.

Trace's mother Tish Cyrus filed for divorce from his adopted father Billy Ray Cyrus on Thursday after 19 years of marriage.