Logan Paul's deep into the 'Prime' of his life ... and we've got the hot shots to prove it!

The internet personality and wrestler turned 31 Wednesday -- no, we're not fooling you on this one -- and we compiled a gallery of his smoking shirtless shots for you to peruse.

Logan works hard on his body ... regularly hitting the gym and fueling up on his famed sports drink Prime.

He's gotta be in shape to keep up with other stars in the squared circle while he's wrestling with other specimens for WWE.

So make an 'Impaulsive' decision and check out the gallery to see Logan in all his glory.

Happy Birthday, Mr. Paul!