In his message, the American actor said on Instagram: "People have been asking me all week, am I nervous, am I nervous about this weekend. I swear I do not feel any nerves. The only reason that is the case is that I spent the week with the players, and you know who's not nervous? The players.
"Don't get me wrong, you look in their eyes and you see that killer look. Prey! They just want to go out there and win, but most of all they want to go out there and have a blast, to enjoy it. To me this is just a giant free hit anyway, we were picked to be like 15th or 16th, so I'm just enjoying the moment and I hope that everyone else is as well."
He added: "I would encourage anyone who is going to be at the Cae Ras with me today to come loud, loud for the boys, from the opening kick off to the final whistle. I know I will be. As always, up the town."