Despite Zayn quitting the group earlier this year, Liam still made a point of acknowledging his part in making them so successful since they were first formed on the UK 'X Factor'. <br /> <br />Liam wrote: "Wowwwww 5 years 5 boys what an amazing journey I couldn't thank you all ever enough and thank you Louis, Niall, Harry and Zayn for everything (sic)."<br /> <br />Zayn responded by retweeting the message for his own followers to see and writing "thanks bro", with a smiley face emoji.<br /> <br />
