The split that happened a couple of months ago was 'completely amicable', reported E! Online.
An insider, who did not reveal a specific reason behind the young duo calling it quits, said, "Taylor is dating and having fun. Nothing serious."
Lautner's representative was not available for comment.
The 22-year-old actor met Avgeropoulos two years back on the set of their parkour action film 'Tracers'.
Prior to Lautner, Avgeropoulos was in a relationship with actor Shawn Roberts, whom she met while filming the 2009 comedy 'I Love You, Beth Cooper'.