Hundreds of air cadets marched to the church from their headquarters under police escort today.
Georgia was a member of the cadets, who today stood arms linked at the funeral service for the former headgirl.
Opening the service of Georgia Williams funeral reverend Mark Ireland said:
"We have come together not to mourn a death but to celebrate a life tragically cut short.
"But the measure of a life is not in the length of days but the impact of its character and the vibrancy and colour of this gathering today is a sign of Georgia's life."
Hundreds of people are arriving today at All Saints church in Wellington, Shropshire, for the funeral of teenager Georgia Williams.
The church grounds have been decorated in ribbons of orange and blue, Georgia's favourite colours for the service, intended to be a celebration of her young life.
Georgia's former headteacher Chay Davies, of Ercall Wood Technology College, is expected to read a tribute to Georgia during the funeral service.
Rev Mark Ireland, vicar of All Saints Church, said the large numbers of people paying the funeral will be comforting to Georgia's family:
"We are glad that young people of the town have turned to the church in this time of distress.
"We know it will be a great source of comfort for her family to see so many people coming together to celebrate Georgia's life."
Hundreds of people are expected to attend the funeral of murdered teenager Georgia Williams in Shropshire today.
Her body was found almost 50 miles away from her home in Wellington, in woodland in North Wales. A 22-year-old man has been charged with her murder.
The service is taking place at All Saints Parish Church in Wellington at 2pm.
West Mercia Police say there are continuing to look for Georgia Williams' missing bag, make-up bag, mobile phone and jacket.
The bag is a 'distinctive' spotty leather satchel, and her pink make-up bag has a flowered pattern and contains various items of makeup.
The black, leather-type coat Georgia was wearing when she was last seen leaving her family's home is also missing, along with her white Samsung Galaxy Y smartphone.
Police have formally identified the body found in woodland near Wrexham on Friday as that of missing 17-year-old Georgia Williams.
– Detective Superintendent Adrian McGee, West Mercia Police
Although we are not in a position to release any further details for legal reasons, and out of respect for the Williams family at this terribly sad time, I am also able to confirm that Georgia died as a result of pressure being applied to her neck.
An inquest into Georgia’s death will be opened at Wellington Civic Centre at 2pm this afternoon but this will be immediately adjourned till a later date.
17-year-old Georgia Williams disappeared from her home in Wellington in Shropshire on Sunday May 26. Police searching for her discovered a body in woodland off the Nant-y-Garth pass near Wrexham on Friday. Officers have yet to formally identify the body.