Grace disclosed that although Neeson often plays very brooding men on the big screen, he is extremely friendly in real life.
"Taken 2, it's the 'Don't mess with Liam Neeson show' still, which is fantastic," she quipped, reports Flicks and Bits. "And Liam, he's a really, really good man and very easy to work with. He's very giving and he's just a very soulful person, very easy to talk to."
The actress added that most people would be surprised to know that Neeson is wickedly funny.
"He has an incredibly twisted sense of humour - which I do too," Grace admitted. "It surprises me sometimes seeing him interact, he's so calm and soft-spoken at times, and then he has this great Irish sense of humour. That just makes life better on set."
Grace added: "I've been very blessed to work with Liam Neeson, I've admired him for a long time as an actor. And I think the reason we had the success of the first film... is largely due to the fact that Liam is just immensely empathetic and really has such a substance to him.
"He's a man with a particular set of skills, come on, what's not to love."
Neeson previously suggested that Taken 2 depicts his character Bryan Mills as a man who's grown tired of killing.
Taken 2 opens on October 4 in the UK and October 5 in the US. Watch a trailer for the film below: