Kym, who plays Michelle Connor in the ITV1 soap, attended a charity event in Manchester and dressed to kill - literally!
The soap star and singer wore a Poison Ivy fancy dress costume, especially made for the event at which she was performing.
Her boyfriend Dan Hooper, who used to date Hollyoaks actress and Kym's former friend Stephanie Waring, donned a white vest and tight jeans to portray X-Men's Wolverine.
The bash is an annual event held by fellow Corrie star Simon Gregson and his wife Emma Gleave, and this year was a superhero and cartoon character theme.
After the evening, Kym tweeted: "Had an amazing time last night @simongregson123 @emmagleave charity ball! so fun and lots of cash raised for good causes!! X"
Soap star Brooke Vincent dressed up as catwoman for the bash, while pal Antony Cotton wore a black suit and sunglasses - more Men In Black than Marvel comics!
Simon himself dressed in a typically comical costume, with chest out, leopard-print leggings, red cape and bum bag. Although we've never seen a superhero quite like him before, he certainly made us laugh!
The charity ball took place at The Palace Hotel Manchester in aid of Caudwell Children's charity.
Whose fancy dress costume do you prefer? Tell us below!