Dan Carter's priceless surprise for Auckland rugby juniors Eden Wizard

When a team of Auckland rugby juniors began their first tackling session they didn't realise they were going up against All Blacks star Dan Carter.

A video ad filmed for Mastercard shows Carter dressed in tackle pads to train with the Eden Wizard's Under-9 rugby team.

Carter posted the ad to his Facebook page yesterday saying: "Absolutely loved this priceless surprise."

The boys' reaction to seeing Carter is priceless. Photo / Supplied

The tackle pads fully disguised Carter from the young boys trying to tackle him.

He removes the head piece of the suit and the boys are shocked to find it is Carter.