"People like scary stories. There's a fascination with fear themes, and we want to face those things in a weird, subconscious way." - Mel Gibson
Mark was seen getting among his fans earlier in the evening, as he posed for selfies after exiting The Merrion Hotel with his on-screen father Mel Gibson.
Mel Gibson, who kept a low profile upon his exit, after joining Mark and Will on their world tour to promote the Sean-Anders directed comedy sequel.
The trio will also join star John Lithgow at the red carpet event on Wednesday, after the film opened to surprising success across the Atlantic with a $30 million opening weekend.
Irish fans of the funnymen behind the flick can catch the film when it opens in the UK on November 22.