The Queen will address the nation on Sunday - hours before Harry and Meghan's tell-all interview with Oprah Winfrey airs in America.
A pre-recorded message from Her Royal Highness will be shown at 5pm, before the broadcast of A Celebration for Commonwealth Day on BBC One.
In it, BirminghamLive reports that her message will praise how people across the Commonwealth have come together during the Covid-19 pandemic.
Commonwealth Day (Monday, March 8) is an annual marker that celebrates the union of Commonwealth nations across Africa, Asia, the Caribbean and Americas, the Pacific and Europe
ITV has confirmed it will air Prince Harry and Meghan Markle's confessional interview with Oprah on Monday night, at 8pm, after it has already been broadcast on CBS on Sunday night.
Oprah has already said that "no subject is off-limits" during the bombshell two-hour special.
The interview is set to allow Meghan and Harry the freedom to "speak your truth".
In teaser clips, Harry hints his biggest fear was "history repeating itself" - with Meghan accusing The Firm of "falsehoods" in an extraordinary accusation.
The Prince of Wales has recorded a message for the BBC One Commonwealth programme addressing "the universal devastation caused by the coronavirus pandemic".
Prince Charles will also celebrate the "critical work" being carried out by nations across the Commonwealth to combat climate change and protect its unique landscapes, marine environments and biodiversity.
In a statement, the palace said: "In Her Majesty's annual Commonwealth Day message, the Queen will pay tribute to the way in which communities across the family of nations have come together in response to the pandemic."
