Proof: Amanda Seyfried and Justin Long Are Definitely Dating

Amanda Seyfried's been rumored to have a new man in her life since early August and now it's official: She's dating fellow actor Justin Long

.Mr. Long spent Labor Day weekend with his gal and walked her dog. Now, this may seem like no big deal, but Seyfried loves her dog Finn like a son. So, the fact that this dude is in with Finn means it's love — or on it's way to love, or something. Anyway, things are looking good. 

Plus, the stars didn't stop smiling throughout their trip to the dog park and while taking Finn to the groomer after spending the afternoon outdoors. Cute, right?

Check out more adorable pics of the stars' day date below: