The Duchess also spoke to Ant about his addiction battle at the drug addiction awareness event.
The Duke and Duchess of Sussex now live in Montecito, California with Archie and Lilibet.
The Duke of Cambridge reportedly did not support his brother's decision to marry someone he barely knows.
Charlotte is also expected to grow richer than her cousins, Archie Harrison and Lilibet Diana.
Ostler noted in 2016 that competition might not be the only reason behind the coldness between the royal women.
The Duke of Cambridge wore a black turtleneck top and the green velvet jacket he first wore to a charity gala in 2019.
"The choice to wear old clothes maybe would've made some people feel very uncomfortable."
The guests at the event were asked not to purchase new outfits for the programme.
There are no enforceable rules that one has to follow when meeting the royals, as clarified on the official royal family's website.
The report comes days after the monarch was seen walking with the assistance of a cane in public for the first time in 17 years.
The Duke of Cambridge shares Princes George and Louis and Princess Charlotte with Kate Middleton.
Research reveals that Kate's family line had some aristocrats as well, including countesses and earls and even a Prime Minister.
There have also been rumours that they want a christening for their newborn daughter in the UK, but these reports have not been confirmed.
Kate reportedly felt "nervous" being around the monarch in her early days as a royal and "was so desperate to impress."
The Duke and Duchess of Sussex got married on May 19, 2018, in St George's Chapel at Windsor Castle.
Royal expert says Prince Andrew and Prince Charles are also to blame for hampering George's chances to the throne.
The conversation happened during the BAFTA Awards on February 11, 2019, over nine months after William and Kate welcomed their third child Prince Louis.
"Both women professional enough to know that there was no gain in showing dissent or disdain."
The actor plays the villain Lyutsifer Safin in "No Time to Die."
Royal insiders say Kate's stunning fashion transformation at the "No Time To Die" premiere was a well-thought decision.
William has also adopted his grandmother's strategy of "never complain, never explain," which has earned him favour from the British public.
Kate said that their family had "lots of animals during lockdown" as they were often like "therapy."