Billie Piper and husband Laurence Fox with baby WinstonNew mum Billie Piper has revealed that being a mum is her toughest job ever.

The 26-year-old actress says she had no idea what she was getting herself into before she gave birth to baby Winston three months ago.

She's chatted to Hello! magazine and said: "I had absolutely no idea how tiring being a mum was – or how hard mums have to work.

"I have worked some sh***y hours in my life, but these are the toughest I've ever had."

The actress says of the bairn: "He's a restless sleeper. He gives us hope, then he changes his routine."

But aside from a lack of kip, Billie is overwhelmed by love: "That feeling of unconditional love, I used to think it was so cheesy when people said that before, but it's something I finally understand."

Heartwarming stuff.

So is all this motherhood lark leaving any time to stay in shape?

"As far as I am concerned, exercise is the most boring thing in the world. If I do anything, I just pound away on the treadmill. I don't find ways to enjoy it more because it's pointless. It's hard enough with a baby and thinking about work again – it gets too much."

We feel ya, Billie.
 
But the Secret Diary Of A Call Girl star has a new year's resolution: "I am going to start. The diet, the regime – it will start. It will be quite intense. It's boring and hellish, I'm sure, but if you've got to bare your ass on TV, you don't want it to look bad."