He’s always up for a good time, and last night (July 18) Ryan Reynolds paid a visit to “Late Night with Jimmy Fallon.”

The “Van Wilder” hunk was in the house to promote his new movie “R.I.P.D.” though the real attraction was his game of “Water War” with Fallon.

Based on the usual “War” card game, Reynolds and Fallon got to douse each other with water throughout the exchange.

At one point, Ryan exclaimed, “You have beautiful nipples, Jimmy,” after the host’s white shirt failed to cover him adequately.