This Morning host's already recorded scenes
The This Morning crew arranged for the presenter to make a cameo in The Pale Horse as a birthday surprise.
Holly, 29, recorded her scenes as spooky Goody Carne earlier this month.
‘It’s been a life-long ambition for me to appear in one of the Marple films as I’ve been a fan for years,’ she says.
‘I had an amazing time and felt very welcomed by everyone on set.
‘I’m so grateful to everyone who made this possible for me.’
Holly Valance will also star in the ITV special.