Not sure about the best way to say happy birthday to your son? Explore dozens of heartfelt birthday wishes for sons.

To mark the special occasion, the star shared a montage of pictures and videos that are sure to melt your heart ...

No one can make me laugh and smile like you do. You’re such a joy to be around. Happy birthday! I’m so honoured to call you my son. I wish every person on earth would experience this kind of love.