What advice do you wish you'd shared before your son's first day at school? When he missed or scored that goal? Or the day he left home?

When was the last time you hugged him?

And what would you do if you had your time again?

Award-winning actor Stephen Graham and psychology lecturer Orly Klein have invited fathers from all walks of life to put into words the things they couldn't say out loud to their sons.

Full of hope, fear, shame and pride, Letters to Our Sons is a raw and extraordinary outpouring of the sometimes messy, often joyful, and always complex realities of modern fatherhood.

Be part of the conversation. It's time to really talk.