Bradley Cooper thought the timing of his daughter's birth was "kind of perfect."

Bradley Cooper

Bradley Cooper

The 43-year-old actor's partner Irina Shayk delivered their little girl Lea De Seine, now 18 months old, a week before his debut directorial role on 'A Star is Born' and he has admitted the timing of her arrival couldn't have been better.

Speaking to America's W magazine, he said: "I'd wake up and work out, followed by two hours of guitar practice and two hours of piano lessons. Lunch. Then Lukas Nelson, my collaborator, would come over, and we'd write music for one and a half hours. I'd write the screenplay for the rest of the day. Irina was pregnant, so it was kind of perfect. Lea was born a week before we started shooting."

Bradley can't believe how much his life has changed since he became a father.

He said recently: "I spent about 15 years going from movie to movie to movie. And then I hit 39 and I stopped and I said, 'What do I really want to do?' I want to tell Joseph Merrick's story in 'The Elephant Man'. So I did that for a year. Then this story came to me, 'A Star Is Born', and then I spent the next four years doing that. And the one thing that I know in the future is: It's worth all the time to dedicate, even if one piece of art comes out of it in a half a decade, that would still be incredible as long as I can feel like it's the movie I wanted to make, which is this movie. So I guess having a child, and having a family of my own - which is a miracle and something I've always dreamt of - has opened me up even more, I guess, to the day, and to be present."

And the couple - who have been together since 2015 - want more children soon.

A source said recently: "They are both extremely thrilled and feel so blessed. Bradley and Irina love each other so much and this is not gonna be the only kid - there will be a few more after this one. Both families are very happy."