A body language expert revealed to RadarOnline that the pair were attempting to "ignore each other", as to not draw attention to their rekindled relationship.
Judi James said: “Andrew has been seen looking quite smitten with his ex wife during earlier outings but he seemed intent on walking past her in the chapel without a glance or a nod.
“The pair did line up on the steps together as Jack and Eugenie drove off but while Andrew stood next to Jacks mother Fergie clung to his fathers arm in a gesture of affection and mutual support.”
Fans are convinced the cold act was just a ploy.
Following the pair's appearance at their daughter's wedding, Twitter was inundated with royal fans wanting answers.