The 39-year-old actor - who has three older brothers - admitted to the publication that he was really keen to have a daughter because he feels comfortable "being surrounded by oestrogen".
He said: "Having a daughter was a dream come true for me, I would have made a terrible king.
"I never admitted it out loud, to myself or my wife, but I really wanted a little girl. It's the best.
"I don't have to prepare to be wrapped around my daughter's finger, I have been wrapped around her little finger since the day she plopped out into this world."
Ryan recently defended the name of his little one, insisting James - the name of his late father - is not a "weird" moniker for a baby girl.
He said: "We named her after my father
"In the spectrum of weird celebrity baby names, I feel like we're not really breaking any new ground here.
"It's not like Summer Squash Meadow Lark, or something. I also thought of all the letters being silent in her name, so it would be just be 'haaaa'."
- Bang! Showbiz