The Royal family honours Prince Philip in the new trailer for “Prince Philip: The Royal Family Remembers”.

The tribute film looks back on the life of the late royal patriarch, including interviews with everyone from Prince William to Prince Charles.

The trailer, revealed to People magazine, features clips of the Royals looking back on the legacy of Philip.

Prince William remembers his grandfather fondly in the trailer, calling him “the heart of the family” and saying that he’s “always been a huge presence behind everything we’ve done, really.”

READ MORE: The Royal Family Remembers Prince Philip On What Would Have Been His 100th Birthday, The Queen Receives Special Rose

Prince Harry chooses to remember the strength of Prince Philip’s character, saying, “What you see is what you got with my grandfather. The authenticness of him. He was unapologetically him.”

The film was originally intended to mark Prince Philip’s 100th birthday and features clips from the Queen’s private collection. It will also go inside Buckingham Palace into the Duke of Edinburgh’s study, private office and library.

READ MORE: Justin Trudeau Remembers Prince Philip’s Last Visit To Canada, Shares Moving Tribute Message: ‘A Man Of Great Purpose And Conviction’

Philip died in April, two months before his 100th birthday.

The film will be available for North American audiences on Dec. 16 on Discovery+.