Stephen Baldwin — I’mma Kick Kevin Costner’s Ass … In Court

It”s day two in Stephen Baldwin“s epic trial against Kevin Costner — and Baldwin just showed up at the courthouse guns drawn … ready to bring his A-game.

Baldwin arrived at New Orleans court moments ago with a big smile on his face — claiming he feels great. Costner appeared slightly more stoic on his way inside.

our sources broke the story … Baldwin sued Costner back in 2010, claiming the actor tricked Baldwin into prematurely selling off profitable shares in a company that builds machines designed to clean up oil spills. The company later scored a $52 million deal with BP.

Baldwin wants $21 million in damages.