The reality TV star, 34, confirmed the news on Saturday (21 February) that Sir Philip Green had handpicked her to be his latest muse!
In a very happy tweet, boutique owner Gemma wrote: "Today is one amazing day I am buzzing so happy over the moon woo hoo Evans @GemCCollection it's a dream come true x."
Fans were quick to show their support, with one saying: "Massive achievement! Well done, lady."
Another enthused: "About time. That shops only for twigs/stick insects!! #NotSkinny #Proud."
One lady gushed: "Congratulations!! You do plus size women proud never change the way you are for anyone #gempower."
The Mirror broke the great news when it reported that Gemma had inked a £50,000 deal with Sir Philip Green to "bring sexy back" to the Evans store chain.
Philip, the Arcadia Group chairman, famously persuaded supermodel Kate to design clothing for his Topshop chain.
Gemma will be the first celeb to represent Evans - which stocks sizes from 14 - 32 - since The Gossip singer Beth Ditto in 2009.
On the day the fabulous news was announced, Gemma had another reason to have a big smile on her face...
The bubbly Essex girl had a visit from I'm A Celebrity... co-star Kendra Wilkinson!
Sharing pictures of their reunion on Instagram and Twitter, Gemma said: "Me and kendra drinking champers today woo hoo lovely girl.
"Love my jungle girl kendra such fun today in Essex."
Wow Gemma, what a day!
Are you excited about Gemma Collins being signed as the new face of Evans? Tell us below and you could win £50!
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!