Former Strictly Come Dancing star Dallerup, 36, dressed in a traditional white floor length gown, while her soap star partner wore a light beige suit and cream tie.
The couple became engaged last year during a romantic break in Capri. Dallerup said at the time: "We were walking to my favourite beach. You have to walk down 2,000 steps to get to it and, half way down, Kevin got down on one knee and proposed. I thought he was joking at first. Then he gave me the ring."
Dallerup was previously engaged to Strictly pro Brendan Cole, but the pair split following rumours that he was having an affair with Natasha Kaplinsky.
She departed Strictly last year after winning the 2008 series with Tom Chambers. She went on to appear in last year's I'm A Celebrity..., but was forced to pull out after falling ill.
Sacre plays Jake Dean in Hollyoaks and appeared on reality series Dancing On Wheels and The Underdog Show, where he first met the Danish dancer.