Hollywood star Liam Neeson has never understood the lure of starring in superhero movies because spending hours in the gym to "pump" up his muscles doesn't appeal to him. The Taken star famously portrayed Batman's arch-enemy Ra's al Ghul, also known as Henri Ducard, in 2005's Batman Begins and The Dark Knight Rises in 2012, but modern superhero blockbusters aren't top of his watch list, report aceshowbiz.com.

"I'm really not a huge fan of the genre," Neeson said to US news show Entertainment Tonight. "I think it's Hollywood with all the bells and whistles and the technical achievements and stuff -- which I admire -- but I have no desire to go into the gym for three hours every day to pump myself up to squeeze into a Velcro suit with a cape. I admire the actors and I know some of the actors who do it -- and do it fantastically. It's just not my genre, it really isn't," he added.