Singer John Legend says he has found that fatherhood is all about learning how to work together with your partner.
Legend has a daughter, Luna, with his model and wife Chrissy Teigen. They are expecting second child together.
"I don't know if there were a lot of surprises. You are just really learning every day," etonline.com quoted Legend as saying.
"Part of it is learning how to parent together because even though Chrissy and I have been together for a long time, we haven't been parents together until the last year. I think you start to learn how to parent together and what kind of responsibilities you want to share and take on," he added.
The singer says it is "really just fascinating watching the human mind develop and seeing what they pick it up and how quickly they pick it up".
"When they start walking, when they start crawling. How excited you are just when they start to turn over for the first time by themselves, all these little milestones that might seem silly to some people who don't have kids are really exciting for us.
"And I think just watching her grow has been the most exciting thing. And when you start to see a personality develop, it's just really cool," he said.