Sandy (Gillian Taylforth) and Fraser (Jesse Birdsall) will surprise their families by announcing their plans to marry at the last minute in this week's festive episodes.
While viewers know that Fraser is a criminal underworld boss who has masterminded much of the recent trouble in the village, Sandy has no idea of his true nature as she walks down the aisle.
Fans can expect some twists and turns surrounding the wedding as Hollyoaks' high drama continues over the show's Christmas episodes.
Charlie Clapham, who plays Sandy's son Freddie, told Digital Spy last week: "I think this wedding will have a lot of consequences, as weddings often do for families. Will certain families want to be together, will they see it as a good move? Does everyone know who they're joining onto? These are all things that are very interesting to play."
Alfie Browne-Sykes, who plays younger son Jason, added: "It's quite exciting to know that the stuff that's on air around Christmas is all about the Roscoes. I really did appreciate that and I'm happy that we've got such a big storyline airing at this time of year.
"There's a Roscoe wedding and we had a great laugh filming it. Whenever there's a Hollyoaks wedding, there's always something exciting going on!"
Hollyoaks airs the wedding scenes on Christmas Eve at 7pm on E4 and Boxing Day at 5.35pm on Channel 4.
Hollyoaks schedule changes over Christmas and New Year - full guide
Hollyoaks: Alfie Browne-Sykes on Roscoe family Christmas storylines
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Digital Spy Soap Scoop video - press play below for gossip on this year's Christmas storylines, including shock violence and an arrest on Coronation Street, a murder plan in EastEnders, an Emmerdale fire and more Roscoe dramas in Hollyoaks.