Credit: Larry Busacca/Getty Images

The clock has run out on Kiefer Sutherland's romance with Siobhan Bonnouvrier.

After nearly three years together, the 24 actor has parted ways with Bonnouvrier, a source close to the style director for Allure magazine tells Us Weekly.

"They've split for now," the says the source, explaining that things are "transitional and ever changing."

Adds another pal: "It's been a while [since they split]." 

The duo fought rumors of an engagement last year. Twice-married Sutherland, now 44, was set to wed Julia Roberts back in August 1990 before the Pretty Woman actress famously called off the nuptials.