Jaime King didn't know what love was until she became a mother.

The 34-year-old actress welcomed her son James Knight into the world five months ago with her husband Kyle Newman, and she admits her own perspective on life has changed since his arrival.

She told People magazine: ''You look at this little child and any part of you that wants to go off into a lala land or any sort of selfish behaviour or ideas, you look and you know what love is. I don't know how to describe it other than it's the most profound thing that could ever really happen.''

The 'Hart of Dixie' star - who has chosen her friend Jessica Alba to be the godmother of James - admits, while the self-help books and advice from her pals were useful, nothing could prepare her for parenthood until she had met her son for the first time.

She explained: ''You think you know and you have no idea.You realise how powerful we are as creators and you realise that there's no room for you own [stuff] any more.''

She added: ''It's [being a mother is] really challenging, I think your whole life changes.''