Prince William, Kate Middleton and Prince George honoured the anniversary of Princess Diana’s death with a trip to visit her family, according to a Daily Express report.

The Duke and Duchess of Cambridge reportedly took their newborn son to see Diana’s eldest sister, Lady Sarah McCorquodale, and her family in Stoke Rochford in England over the weekend. The royal couple and six-week-old son were seen boarding a helicopter not far from her home, the British paper said.

Princess Di died in a car crash in Paris on Aug. 31, 1997. Her boyfriend Dodi Fayed and their driver Henri Paul were also killed.

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  • 1969

  • 1971

  • September 1980

  • January 1981

  • March 1981

  • May 1981

    With Prince Charles at Craigowan Lodge on the Balmoral Estate. (Tim Graham/Getty photo)

  • June 1981

  • July 1981

  • December 1982

  • July 1981

    Posing for pictures on her wedding day. (Lichfield/Getty photo)

  • July 1981

    More wedding pictures! (AP photos)

  • November 1982

    At a banquet at the Guildhall in London. (Anwar Hussein/WireImage photos)

  • March 1983

  • June 1983

  • May 1985

  • July 1985

    At the premiere of "A View to a Kill" in London. (Tom Wargacki/WireImage photos)

  • October 1985

  • October 1985

  • November 1985

    Wearing a Victor Edelstein gown to a White House State Dinner in Washington, DC. (Pool/Tim Graham Picture Library/Getty photos)

  • December 1985

  • January 1986

  • July 1986

  • December 1986

  • May 1987

  • January 1988

  • November 1988

  • March 1989

  • April 1989

  • August 1990

  • December 1990

  • September 1990

  • April 1990

  • July 1990

    Leaving Cirencester Hospital in England after Prince Charles broke his arm during a polo match. (AP photo)

  • July 1991

  • May 1992

  • September 1991

  • April 1991

  • February 1992

  • April 1992

  • January 1993

    At Indian Castle Beach. (Getty photo)

  • June 1994

    At the Serpentine Gallery in London, wearing a dress by Christina Stambolian. (Jayne Fincher/Getty photos)

  • June 1995

  • August 1995

    Sitting with Prince Harry during V-J Day celebrations in London. (AP photos)

  • November 1995

    Meeting with Argentinian president Carlos Menem in Buenos Aires. (AP photos)

  • June 1995

  • September 1996

    Arriving at a cancer research benefit in Washington, DC. (AP photos)

  • December 1996

    Walking through the Metropolitan Museum of Art in New York to attend the Costume Institute Gala. (AP photos)

  • March 1996

  • June 1996

  • July 1996

  • January 1997

    On a British Red Cross mission to highlight the evil of land mines in Luanda. (Getty photo)

William opened up about his mother's death in 2009 after becoming the Royal Patron of the Child Bereavement Charity, which Diana helped launch in 1994.

What my mother recognized then, and what I understand now, is that losing a close family member is one of the hardest experiences anyone can endure,” he said in a speech. “Never being able to say the word ‘Mummy’ again in your life sounds like a small thing. However, for many, including me, it’s now really just a word – hollow and evoking only memories.”

He is “particularly close” to his aunt Sarah, the Daily Express said, and William and Harry spent their childhoods playing with their Spencer cousins.

Diana’s death recently made headlines again following a claim that British special forces were involved. A 2008 inquest found Princess Diana and Fayed were unlawfully killed due to the “grossly negligent” driving of their car and those following it.