Following three years of dating, the clock has hit zero for Kiefer Sutherland and Siobhan Bonnouvrier. This couple broke up earlier in the year, though word is finally spreading now.

"It's been awhile," a friend told Us Weekly of the split, though another emphasizes that the break could be temporary because the relationship is "transitional and ever changing."

Way back in 1990, Sutherland was engaged Julia Roberts before the actress called off the wedding.

He's moved on well, though, both personally and professionally and will return to the small screen in early 2012 with Fox's Touch, a drama written by Heroes creator Tim Kring.

[Photo: Pacific Coast News]