The iconic star passed away at her holiday home in Spain following a fall on 1 August. She was 72 years old.
She will be laid to rest in her home city of Liverpool today at a ceremony attended by friends and family including Sir Cliff Richard and Paul O'Grady.
Speaking on ITV's Good Morning Britain today, her friend Christopher Biggins said: "It's going to be a tough day I think but also a joyous day, saying goodbye to our dear friend Cilla and I think this is absolutely the right place for her to return to. It's like Cinderella has returned to Liverpool. If Cilla were here, she'd love it.
"I think she's up there with a glass of champagne and Bobby having a laugh and looking to see who's coming, who's not here, why aren't they here, and just having a good time… It's just wonderful for the family and for Cilla. It's fantastic this tribute that Liverpool is paying to her."
Christopher is among the friends and family who will tae part in the ceremony, giving a reading during the church service. He revealed that last night, those nearest and dearest to Cilla had gathered at a hotel to remember her.
"We had a little party last night in the hotel and the boys are doing amazingly well, I don't know how they're doing it but they are and Robert and Ben are speaking today and it's extraordinary. I think that, you know, they've had so much to do, so much to organise, I think given a few days it will really sink in."
Christopher said that it's not really sunk in for him either, and he still expects his friend to be on the other end of a phone. "You think she's going to ring and say, 'Shall we go to the Ivy?' or you're going to turn up somewhere and she's going to be there. The reality is that she's not but we're going to give her a good send off today, a really good send off."
The funeral will take place today at St Mary's Church in Woolton, Liverpool. Cilla will then be laid to rest alongside her parents at a private service.