How Sister Pulled a Hilarious Year-Long Snapchat Selfie Prank on Her Brother

— -- Perhaps this brother’s New Year’s resolution should be to not pose for pictures with his sister anymore.

For an entire year, Jillian Haker, of Cleveland, Ohio, repeatedly tricked her unsuspecting brother, Ryan, into posing for Snapchat selfies, when in reality, she was recording videos every time.

His reactions are priceless.

“Oh it’s a video. Come on, again?!,” he shouts during one of the pranks.

“What made this prank particularly hilarious is that I'm usually considered the most gullible of the three,” Haker, a triplet, told ABC News of her relationship with her siblings.

“This whole thing started when my brother (who didn't have a smart phone yet) kept taking my phone to Snapchat his friends,” she added. “Then, the video feature was implemented and it just kind of happened. The pranks were over the course of the year, but I kept getting responses from my friends saying that they thought it was hilarious. So, I kept going.”

Haker’s YouTube video of her brother’s hysterical reactions compiled together has gone wildly viral with nearly 1.5 million views since it was posted on Dec. 31.

“The best part about this whole thing is how positive people have been overall about it," she said. “It's a harmless video that doesn't involve anyone getting physically hurt or bullied or anything like that. It's a good natured prank without being mean.”

Ryan is currently working on a cruise ship and “was in the middle of the ocean through New Year's Eve and most of yesterday,” so he only learned of his viral superstardom Thursday night.

“I talked with him briefly because he was paying to use the internet and he told me he was still kind of processing what happened,” said Haker. “Then he started making jokes and truly embracing the ‘internet fame.’ Now, I have to make sure it doesn't go to his head.”

“His enthusiasm just made my job very easy,” she said. “My brother is just a fun guy, which is how he's such a good sport about it.”