James Franco, 1. Dave Franco, 0.

When it comes to pranks, the This is the End star sure can pull a great one. The jack of many trades totally punked his younger brother with an Instagram post so good, it even tricked some of his followers.

"Effron and My brother, dating!!!!!! Congrats, boys! I'm so happy for you!!!," James posted on Instagram Thursday, along with what looked like a screengrab of a Hollywood Life post that had the headline "Zac Efron Dating 'Neighbors' Costar Dave Franco" along with a shot of the duo sitting closely and laughing at a basketball game and an inset of Zac hugging Dave on set.

"My life just ended," one of his followers wrote after seeing the post. If she would've looked a little closer though, she would've seen that the "story" was written by "@davefrancock" and the author's thumbnail picture looked a lot like James (because it was him).

Dave doesn't have a Twitter or Instagram account, and Zac hasn't said anything about the prank on his yet, but we have a feeling they're not going to let James get away with this one.

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