Now, Harry's people have released a statement to the public on his behalf.
“Harry’s stepfather, Robin Twist, sadly passed away this week after a long battle with cancer. The family asks for privacy at this time,” the statement read.
Harry's mother Anne married Robin in June 2013, although he had been part of their life since Harry was young.
Harry walked his mother down the aisle, and was even Robin's best man for the occasion.
Styles' 1D bandmates have taken to social media to share their condolences with the Styles/Twist fam.
"Devastated to hear the news about Robin . He was the such a lovely kind and funny guy. Sending all my love to the whole family." Louis Tomlinson tweeted, adding: "You'll be missed mate :(."
Liam Payne shared a pic of Anne and Robin and captioned the pic:
"Harry my heart really goes out to you such an extremely sad day for us all who knew Robin. What a kind, gentle and beautiful soul, a true rarity to find in today's world. Sometimes they really do take the best of us far too soon. X"
Niall Horan also shared a pic of the pair and wrote:
"Very sad to hear about the loss of Robin . For those who had the pleasure of knowing Robin will know that he was the nicest , kindest, most generous , hilariously funny guy you'll have met . He always had a smile on his face even when he was battling the terrible illness . Love ya H . Please give your mum and the rest of the family a massive hug from my family."
Thoughts are with our angel, Harry and his loved ones at this tragic time. <3