The 37-year-old actor is a father to sons James, 10, and Henry, four, born from his previous relationships. He feels that the existence of love is essential for the world, reported Contactmusic.
"I think the world would sink under the weight of its own more destructive aspects if it wasn't for love, evening the score a little bit," Farrell said.
"Whether it's love between friends, between parents and their children, lovers, whatever it may be. So yeah I do believe in the power of love," he added.
"I'm not going to talk about how romantic I am, which is just another way of saying I've never done anything romantic in my life," he said.