Next Monday's all new episode of ABC hit show "Castle" will deal with wedding preperations, particularly focusing on who Castle will pick as a best man. Competition for the supportive role gets heated between Ryan and Esposito. For spoilers from the actor who plays Ryan, read on.

Seamus Dever plays Ryan on the show, and the actor recently sat down with TV Guide for an interview. Dever discussed how Ryan will handle the competition for best man.

"Ryan [wants] to have nice time at the bachelor party. He knows a great place with a great wine list. He's going to be a classy best man," the actor said.

Dever went on to explain how Esposito will be taking a different approach. Esposito will not be going for the classy best man, but rather the hard partying best man.

"Esposito is going to be like, 'Yeah, I'm your frat boy!'" Dever told TV Guide.

However the actor hinted that both men might be disappointed, due to Castle's aloofness. It seems he is not aware of Ryan and Esposito's desires, but is merely enjoying the ride.

"The whole time they're jockeying for favor, all of their efforts are wasted because he's not even aware of what they're trying to do," Dever said.

To find out if Castle will choose Ryan, Esposito, or someone else entirely as his best man, tune into "Castle" next Monday night at 10/9c on ABC.