The singer sent One Direction fans into a frenzy after he gushed about how "proud" he is of his bandmate for taking home his first-ever Grammy for Best Pop Solo Performance for "Watermelon Sugar" at Sunday's (14Mar21) ceremony.
"Congrats @hshq on your Grammy win. What a huge moment, proud to be your brother," he captioned a meme about the boy band on his Instagram Story, leading to "proud to be your brother" trending on Twitter.
Accepting the award, Harry said, "Wow. To everyone who made this record with me, thank you so much. This was the first song we wrote after my first album came out, during a day off in Nashville and I want to say thanks to Tom, Tyler, and Mitch. Rob Stringer and everyone at Columbia, my manager Jeffrey who has always nudged me to be better and never pushed me, thank you so much, I feel very, very grateful to be here."
"All of these songs are f**king massive so thank you so much. I feel very honoured to be here among you, so thank you so much," he said.
Harry's Grammy success came after former One Direction band member, Zayn Malik - who quit the "What Makes You Beautiful" group in 2015 to pursue a solo career - blasted The Recording Academy and accused them of having "secret committees."
He tweeted, "@recordingacad are moving in inches and we need to move in miles. I'm keeping the pressure on & fighting for transparency & inclusion. We need to make sure we are honouring and celebrating 'creative excellence' of ALL. End the secret committees. Until then ... #f**kthegrammys (sic)."