Harry Styles, One Direction Members Arrive at Liam Payne's Funeral

Harry Styles and members of One Direction arrived at a London-area church on Wednesday to say their goodbyes to Liam Payne ... just over a month after the singer's death.

The private service is taking place at St. Mary's Church in Amersham ... where Liam's coffin arrived in a horse-drawn carriage.

Liam's former One Direction bandmates including Harry Styles, Zayn Malik, Louis Tomlinson and Niall Horan were seen entering the church.

Kate Cassidy, Liam's girlfriend who was with him in Argentina days before he passed away, was seen walking into the church in an all-black outfit.

Simon Cowell- who met Liam when he was only 14 and auditioned for "The X Factor"- just arrived.

As we reported, Liam died after falling from the third-floor of his room in Buenos Aires on October 16th. Three suspects have been charged in connection to his death.

Since Liam's death there has been an outpouring of love from those closest to him, celebrities, fans and more. Now, they all gather to pay their final respects.

More to come ...