Holly, 20, was pictured wearing the grey and lime green all-in-one yesterday (18 June) as she and her cast mates headed to an interview with Radio 1.
The Newcastle-born star teamed her onesie with a pair of Nike trainers, a luxe orange handbag and she kept her purple hair loose in a side parting.
Holly's onesie is by OneCM and the star has now teamed up with the company to create her very own range, which is due for release in the coming weeks.
Not only will they be cosy for winter, Holly also feels her all-in-ones will be perfect for the festival season!
Holly visited Radio 1 with her fellow Geordie Shore girls Charlotte Crosby and Vicky Pattison to promote the new series of the MTV reality show.
The guys and girls filmed the series Down Under and all lived together in a very funky Australian house.
Geordie Shore: Going Down Under launches 9 July at 10pm on MTV.