She started as a pop-star, married a DJ and found a new life for herself as an actress.
Billie: live in the Breakfast studio
Now, after giving up her role as Doctor Who's assistant Rose, Billie Piper's career is taking another turn - towards the West End stage.
She's making her debut in a revival of Christopher Hampton's Treats, which was first produced at the Royal Court more than 30 years ago.
We found out more on Breakfast this morning, when Billie Piper joined us live in the studio.
We began by showing Billie's final moments with Doctor Who - in which both of the characters were in tears as they said goodbye.
"That was the real deal," Billie told us. "It was heartbreaking (to leave) because we got on so well.
"But I wanted to get out before I was too scared to."
Billie went to stage school for a couple of years before her pop career took off.
"I missed acting so much when I was singing," she told us "I felt like a bit of a charlatan when I was singing."
So, when she decided to re-launch her career, Billie took some acting lessons in the US - and her career on TV began.
Her role in Christopher Hampton's play is her first professional stage role - and she admits that she's already feeling first night nerves.
"I care about this so much more than the singing, that's why I'm so nervous."
Billie Piper stars with Kris Marshall and Laurence Fox in Treats by Christopher Hampton. The production opens tomorrow in Windsor and can be seen at the Garrick Theatre London from February 20, 2007