The 34-year-old actress had the inking ''Mr Fox 31-12-07'' after the pair tied the knot on New Year's Eve in 2007 in West Sussex, south east England, but she has erased the tatt after they separated in March and divorced in May.
A source told The Sun newspaper: ''She wants to move on from him and removing her tattoo is a huge factor in that. It's been a long process but she's happy with the results.''
Billie showed off the results of her tattoo-less arm at the London Evening Standard Theatre Awards on Sunday (13.11.16), where she won Best Actress for Spanish play 'Yerma'.
In 2010, the brunette beauty described the inking as ''vulgar'' and admitted it was a drunken mistake while the former couple were on holiday.
She said: ''It's disgusting. We were in Mexico and both so drunk. I think we both regret it now. The thing is, I just look at it and think, 'God that's vulgar.' I don't know what I am going to do about it.''
The star - who has son Winston, eight, and four-year-old Eugene, with her ex - didn't ever take Laurence's surname.
She previously said: ''Laurence was like, 'If you want to call yourself Billie Piper Fox, that's grounds for divorce.' Also, I really admire a woman who takes her husband's name and gets rid of her maiden name, but I can't for work.''
Billie is now dating rocker Johnny Lloyd, while Laurence is in a relationship with model Vogue Williams.
A source previously said: ''It's very early days but both Laurence and Vogue consider themselves an item. They're enjoying spending time together and have had some great nights out. It's very recently turned into a romance because they get on so well.''
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