10:25AM, Dec 21, 2006
Moving on in one's career is not always a happy experience.
Because sometimes you wonder if you've done the right thing.
Billie Piper has revealed that leaving Doctor Who was one of the saddest things she's ever done.
And she still worries that she made the wrong move by doing so.
The 24-year-old actress, who won awards for her role as Rose Tyler in the cult drama series, says she probably won't watch the new season, because it will be too upsetting.
She told The Sun: "It was such a hard decision. I still cry about it. I'm such a cry baby.
"I don't know if I will be able to watch the next series.
"I'll probably have to sit behind the couch with a cushion over my eyes."
Billie is optimistic about the future, but will always look back on her time as Rose with affection.
She added: "Life has to move on and there are great things happening in British TV.
"I just hope I don't regret leaving!"
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