AnnaLynne McCord and her boyfriend Dominic Purcell have ended their relationship.

The 90210 star called it quits with the 42-year-old English-born Australian actor after spending 15 months together.

Reports suggest that AnnaLynne, 25, reflected hard about her romance with Dominic after her two sisters recently got engaged.

"Though AnnaLynne's not in a rush to get married, her sisters getting engaged must have made her evaluate her own relationship to some degree," an insider told Us Weekly.

A source tells the publication AnnaLynne "fell for Dom hard" at the beginning of their relationship despite their 17-year age gap.

But things began to fizzle when the Prison Break star seemed "more into AnnaLynne than she was into him."

The Los Angeles-based actress opened up about their relationship in October of last year, while Dominic was away shooting action film Vikingdom in Malaysia.

And even then the long-distance affair seemed to be taking its toll.

"Right now it sucks," she told UsWeekly.

"I keep getting pictures of him in all his Viking outfits, and I'm like, 'Are you just trying to tease me?' He just left a week ago and it feels like a month or a year."