(Cover) - EN Showbiz - Rachel Bilson and Hayden Christensen have reportedly ended their relationship again only months after a romantic reunion.

The Hollywood couple had only ignited their on-off romance a few months ago in December 2010, after calling off their engagement the previous June.

Difficulties to agree on living arrangements were believed to be behind their initial break-up. It was reported that Hayden wanted to reside in his native Canada, while Rachel preferred to stay close to her family in Los Angeles.

The couple sparked rumours of a reunion when Hayden was spotted leaving Rachels apartment in Los Feliz, California, at the end of last year, following a break to re-evaluate their relationship.

But sadly the couple couldnt make it work if reports are to be believed.

"They're done this time," a source told US Weekly. "Engagement's over, relationship's over. She's really had it."

Rachel and Hayden, both 29, met on the set of 2007 film Jumper and dated for almost three years before their first split. (C) Cover Media