Actor-director Ben Affleck has reportedly been banned from playing blackjack at a Las Vegas casino.

The `Argo` director and star was approached by security at the Hard Rock Hotel and Casino after they spotted the Oscar-winning actor counting cards - a gambling strategy that involves counting card values to decrease betting risk during a major game - Tuesday.

A source told gossip website TMZ.com that the 41-year-old star, who was in Las Vegas for a romantic trip with his wife Jennifer Garner, before he starts shooting `Man of Steel,` was deemed to be an "advantaged player" and then he was banned from playing the game in the hotel again.

Despite the incident, which is frowned upon but isn't illegal, Affleck is still welcome to play other games at the casino.

"Security said, 'You are too good at the game'. The hotel was really nice about it and told him he could play other games. They ended up getting him and Jennifer a car back to their hotel too,` another source told UsMagazine.com.

A spokesperson for the celebrity, who has three children, Violet, eight, Seraphina, four, and two-year-old Samuel, declined to comment.