According to The Sun, the couple will tie the knot in a star-studded ceremony before the end of the year, and have asked Ed Sheeran if he will sing at their glitzy reception.
A source said: "They want it to be an intimate affair and have only invited close friends and family. They haven't signed a big magazine deal like a lot of stars do because it's not their style."
Guests are said to include Phillip Schofield and Wayne Rooney.
Christine and Frank have been together for six years and engaged for the last four, after Frank popped the question during a holiday to Los Angeles back in 2011.
In May, footballerf, preferring to keep their nuptials private. "We are going to do a small and pretty intimate [wedding], not a surprise thing, we like our privacy and keeping it to ourselves."
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