Harry Styles
Harry has gone onto global success in his own right since his days with One Direction but admitted that his years spent with Liam are amongst his "most cherished".
Harry said: "His greatest joy was making other people happy, and it was an honour to be alongside him as he did it. Liam lived wide open, with his heart on his sleeve, he had an energy for life that was infectious. He was warm, supportive, and incredibly loving. The years we spent together will forever remain among the most cherished years of my life. I will miss him always, my lovely friend. My heart breaks for Karen, Geoff, Nicola and Ruth, his son Bear, and all those around the world who knew and loved him, as I did."