Billie PiperBillie Piper has revealed that she hadn’t anticipated just how hard motherhood would be.

The former Doctor Who star gave birth to son Winston last October and until a recent run of promotional work for Secret Diary of a Call Girl in the US, she has largely been a full time mum — but that’s not made the job any easier.

She told Hello! magazine recently: “I had absolutely no idea how tiring being a mum was - or how hard mums have to work.

“I have worked some sh**ty hours in my life, but these are the toughest I’ve ever had.”

“[Winston]’s a restless sleeper. He gives us hope, then he changes his routine.”

But she wouldn’t give it up for anything: “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. The smiling… it’s amazing. And having a new best friend for life.”