Michael B. Jordan -- DENIED at Diddy BET After-Party (VIDEO)

Michael B. Jordan, one of the biggest actors in Hollywood, learned Sunday night that the L.A. fire code carries more weight than star power.

Michael was turned away from Diddy's post-BET party at Boa because the place was at capacity.

Michael was cool about it, preparing to leave when one of Diddy's lieutenants sprinted out of the restaurant, telling him Diddy was going to personally get him in.

But the law's the law, and Jordan was turned away a second time. Diddy came to the front door to see if he could grease the wheels, to no avail.