An overly friendly California mutt has captured the hearts of thousands on Instagram—because he just can’t stop smiling!

Lisa Reilly’s pit bull mix named Meatball can’t help but mug for the camera every time she takes it out.

Reilly said that’s partially because after she takes his picture, he’ll be rewarded with a doggie treat.

“As soon as the treats come out, he just goes crazy. And any time the camera is on, he knows he’s getting food,” she told ABC News.

Meatball’s smiles are so endearing that Reilly said it was his picture itself that made her want to adopt him from the Fresno Bully Rescue.

“As soon as the camera turns on he just gets this huge grin on his face,” she said.

Meatball is the star of Reilly’s weekly “Meaty Monday” pics on her instagram page, "Loveabulllisa", where he can be seen smiling with everything from a tennis ball to a glass of white wine.

Reilly has garnered more than 35,000 followers on Instagram.

“I just don’t know how you could not laugh every time he is around,” she told ABC.

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