By Gavin Mccafferty, Press Association Sport
Published: 10:44 BST, 3 May 2019 | Updated: 10:56 BST, 3 May 2019
Sir Alex Ferguson was among the mourners gathering to pay their respects to former Celtic captain and manager Billy McNeill.
McNeill's funeral is being held at a church in Glasgow city centre before the cortege makes its way to Celtic Park, where thousands of supporters are expected to pay tribute.
McNeill's body was taken to St Aloysius Church on Thursday evening ahead of a service at 11.30am on Friday morning.
Sir Alex Ferguson was in attendance as thousands gathered to pay respects to Billy McNeill
The former Manchester United manager collected an order of service before the funeral began
Former Celtic manager Brendan Rodgers returned to the club to attend McNeill's funeral
McNeill, standing with the European Cup in 2014, lost his battle with dementia last week
Some streets in the city centre and east end of Glasgow will be closed, with fans expected to line the pavements to pay respect.
Former Rangers striker Ferguson was among those to arrive at Celtic Park, where buses were waiting to transport mourners to the church.