John Krasinski feels blessed to be married to Emily Blunt.

The 'Office' star - who tied the knot with 'The Girl on the Train' actress in 2010 - admits marriage is a ''big commitment'' but he knew he wanted to wed Emily the day they met.

He said: ''I don't know who meets Emily Blunt and doesn't hope that you get to become her husband. So, that was pretty immediate for me. But also, my parents have been happily married for many, many years and truly feel like they're more in love today than they were the day they met.

''Marriage has always been an incredibly sacred thing that you're hoping gets to come your way and something where you get to share happiness with someone else, so I've always respected the idea of marriage and wanted to get married. I will say it's tough. It's a big commitment and it's hard to look at these different people through that lens, because it's an intense lens to put anybody under. But Emily, through any lens, is someone that you just pinch yourself that you even get to be around her, let alone married to her.''

And the 37-year-old actor admits being a father to Hazel, two, and five-month-old Violet has its ''unbelievably hard'' parts too.

He added to Entertainment Tonight: ''One of the things I found so interesting is it felt like there was this idea before we had kids, every time you'd talk to your friends, you ask them what it's like and the sort of standard answer, 99 percent of the time is, 'It's amazing! You're going to love it! It's really special!' Which it is!

''All those things are true. But no one says that it's tough and no one says that it's hard and no one says that they're scared. I had one friend who actually had a baby while we were shooting a movie together and I remember saying to him, like, 'Oh, man! How is it being a dad?' And he said, 'It's the best thing that's ever happened to me and it's so unbelievably hard.'''