Catherine and William also showed off their parenting skills as they joined in with some festive Christmas cracker making, before getting involved in an impromptu fake snowball fight as they made their way back to their apartment after the party.
Kate, who looked festive in a plaid skirt by Emilia Wickstead, delivered a speech at the party in which she thanked the military families for their service.
Additional insider claims that there was a considerable amount of "stress" surrounding the royal family members ahead of Meghan and Harry's wedding suggest there might be some truth to the dress fitting story.
Following The Sun's report on Saturday that the Duchess of Cambridge got upset with the former American actress over how she spoke to Middleton's staff, a Kensington Palace spokesman denied the claim to the British paper.
It was also reported that Kate confronted Meghan last Christmas, when the former Hollywood diva acted "downright rude" in front of the royals.
As a third source noted, "Meghan's a strong character and so is Kate, so it doesn't surprise me there have been clashes".
In an unusual move, Kensington Palace has commented on the alleged ongoing feud between the royal sisters-in-law, Duchess Kate and Duchess Meghan.
Obama also congratulated Harry and Meghan on getting engaged past year - with the couple recently spending the anniversary of their engagement apart - and wrote in a tweet: "Michelle and I are delighted to congratulate Prince Harry and Meghan Markle on their engagement".
Thankfully, it sounds like there may not actually be any bad blood between the popular dukes and duchesses after all. "Absolutely!" she said in a video captured by a fan, after someone asked whether she was excited about the pregnancy.
When George Whitefield, co-director of the children's events company Sharky and George which staged the day's entertainment, appeared with a handful of mock snowballs, that was all the encouragement William needed. "It'll be really special".
But it is understood that both couples will spend the Christmas period with Her Majesty on the Norfolk estate.
Ohio State edged out of College Football Playoff
Both bowls are scheduled for December 29, and the winners will play in the January 8 championship in Santa Clara, California. With the game tied and the ball at midfield with 3 minutes left, Georgia could've punted the ball and pinned the Tide deep.