The mum-to-be is usually seen sporting a sleek blonde bob, leaving the longer style to her sister Sam.
However, it seems Billie has now been persuaded to try out some new locks and we think she looks fab!
Unveiling her latest 'do on Instagram earlier today, she wrote: "Oooooo ... #longhair ...", followed by a lovestruck emoticon.
Clearly, she's a fan of the extensions!
In the snap we can see Billie posing in front of a salon mirror with her bleach blonde tresses styled into subtle curls.
But she hasn't gone all out with the fake hair, as the extensions have been kept at a manageable length, just resting past her shoulders.
This exciting new look is surely a nice pregnancy pick-me-up for the expectant mum, who announced that she was expecting a baby with fiancé Greg Shepherd earlier this year.
Following the happy announcement, Billie and Greg threw a baby shower in Essex, which was filmed for an episode of TOWIE.
At the baby shower, the loved-up couple revealed that they are expecting a girl.
What do you think of Billie's new hair? Let us know below, as the best comment from across the website each week wins £50!
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