AnnaLynne McCord and Dominic Purcell have called it quits.
The seemingly mismatched couple - she's 25, he's 42 - were together for an impressive 15 months, but insiders tell Us Weekly McCord ended the romance after her two sisters 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," claims the source of the 90210 star.
The mole also acknowledges an "imbalance" in the relationship, adding that Purcell (best known for his work on Prison Break) was more "into" McCord than she was into him.
Prior to getting serious with the older actor, McCord dated Twilight Saga stud Kellan Lutz on-and-off from 2008 to 2011.