Kate Hudson and Owen Wilson have called it quits — again.

"Kate and Owen are not together," a source confirmed to Usmagazine.com.

The on-off couple had been working in separate cities. Hudson was filming Bride Wars in Boston, and Wilson was shooting Marley & Me in Miami with co-star Jennifer Aniston.

Rumors of an engagement dogged the couple after a picture of Hudson wearing a prop ring from her movie showed up in London papers. On Sunday, her rep confirmed to Us: "She's definitely not engaged."

Another source close to the couple says they've always had a "loose and open thing — never serious, and definitely not monogamous."

On May 4, Hudson partied with pals in a Boston bar. That same week, Wilson was spotted flirting with women with Miami club Quattro, according to the Miami Herald.

The paper reports that more than a few of them were starting to avoid Wilson's phone calls because he'd become "so skanky."