The Hollyoaks actress has been engaged to businessman Minton for three years, and the pair will tie the knot in a Merseyside ceremony, reports the Daily Mail.
Merna's Hollyoaks co-stars and on-screen family Jennifer Metcalfe, Jorgie Porter and Nicole Barber-Lane will be bridesmaids.
Sam and Billie Faiers, Sheree Murphy, Liverpool footballer Brad Jones and his partner Dani Lawrence will also attend, along with several other Hollyoaks stars.
She reportedly told her friends: "'I am so excited, we have been planning our special day for the past six months and can't wait to enjoy it with all of our friends and family."
Merna later confirmed the news on Twitter, saying: "Hey guys we've set a date," before thanking her followers for their congratulatory messages.
The pair became engaged in 2009 after Minton proposed during a trip to the Maldives.
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