Pippa Evans will play Meghan, while Richie Webb and Dave Lamb have also been cast in the short production, which is one of two episodes of the 15 Minute Musicals series.
Kate is also said to have told friends she was very sad about what was happening and felt that Harry was "changing".
Prince William and Kate ‘will spend Christmas at Sandringham’ as Royal Family rift rumours are quashed
"Thanks to my friend Prince Harry for joining me in my hometown to surprise these outstanding students!"
"I don't think that the sartorial rules of shorts of young boys would be a new one for Catherine".
Royal family observers said this denial was a rare intervention from the palace which does not usually respond to rumours about the personal lives of royalty. However, Queen Elizabeth reportedly likes royal women to wear dresses and skirts, something Meghan has apparently been struggling with.
"So my biggest pieces of advice would be to take some time and don't be in a hurry to do anything".
For those playing at home, it all started over the weekend when a report emerged claiming Kate and Meghan had an argument about how the former Suits star treated a member of Kate's staff.
Manchester United's Victor Lindelof (thigh) expected to miss a month
Following the draw against Palace he criticized the hunger of his players and he has stood by those comments. But United's slow starts have continued to hamper them this season as they are well off the pace in the PL.
Michelle Obama offers advice to Meghan Duchess of Sussex
Kate Middleton's mum Carole has revealed what lies in store for the young royals when they go to Buckleberry Manor for Christmas. Kensington Palace has issued a rare statement about a recent alleged argument between Meghan Markle and Kate Middleton .
Trump and Xi agreement buys time in trade war
Trump and the leaders of those countries signed an updated trade deal, the U.S. -Mexico-Canada Agreement, or USMCA , at the G-20. China also will make fentanyl, a deadly synthetic opioid, a controlled substance, the White House said .
- Watch The Game Awards Live Here
- Jurgen Klopp Handed Punishment Over Derby Pitch Invasion
- Infinity Blade is in Fortnite Battle Royale Season 7
- Baker Mayfield did not seem interested in Hue Jackson hug
- Senator Says Putin and Mohammad bin Salman Own Trump
- Israel police recommend indicting Netanyahu in third graft probe
- How did an eel get stuck up a seal's nose?
- Man Dies After Coughing Up Lung's Bronchial Tree
- Upcoming Google Pixel 3 Lite may feature 5.56in display
- Kareem Hunt 'embarrassed' by video of attack on woman