The reality star has teamed up with unisex street wear brand Paradice Clothing to create her 20-piece line, which includes everything from curve-hugging leggings to comfy hoodies, to summery crop tops.
Talking about her range, Marnie said: "I'm so pleased to be working with Paradice and James Boyle who owns the brand and who is something of an online celebrity himself.
"I didn't want to put my name to any dress range, so I spent a long time working with James to get this collection perfect, and I'm so happy with the results.
"Everything is so cool, and can be worn by slim or curvy girls all the same. Lots of pieces are unisex and Kenzie from The Big Reunion even wore some of the shorts for a magazine shoot recently."
Marnie joined the cast of Geordie Shore last year as the cousin of Sophie Kasaei, who previously starred in the popular MTV show.
"Being the new girl in Geordie Shore has been tough, really tough, but I feel I've come through the other side now and it's time for me to make my own mark," Marnie admitted.
"I don't want to be 'the new girl' anymore, I want to be Marnie."
Marnie's now just wrapped up filming series eight, and it seems she's been working hard to keep her figure in tip-top condition for the show by hitting the gym five days a week.
"After I posted a few pictures online, it did draw some compliments about my bum and waist, which made me feel good," she said.
"What girl doesn't like to be told her bum looks good? After all I worked damn hard in the gym to get in good shape, it's not all natural for me."
Marnie's collection ranges in price from £15-£35 and is available to buy at paradiceclothing.co.uk/collections/marnie.
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