New Zealand police are investigating the disappearance of a 22-year-old British woman who has gone missing while on holiday in Auckland.
The missing girl's father is on his way to New Zealand to search for his daughter.
Ms Millane's brother Michael said: "We are really, really anxious and concerned about Grace".
Mr Beard said none of her roommates at the backpackers were with her on Saturday evening and there was sufficient evidence to suggest she was going to go back to the hostel to collect the items she had there.
Police are searching for a young tourist who went missing after "constant contact" with her family suddenly stopped.
Detective Inspector Beard said Mr Millane is expected to arrive on Friday, the New Zealand Herald reported.
Her older brother said it was completely out of character for her not to be in contact with her family.
Grace had two mobile phones with her but they go straight to voicemail if people ring, her brother said.
"We know some of her property was there (the backpackers) and we have that, but we don't exactly what she had so we don't know what she has on her or if there's anything missing", he said.
The family have posted on Facebook in the hope that others travelling in New Zealand can help find her. She is approximately 5ft 6in (168cm) in height and 58kg.
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"I looked at the photo [of Millane] and I was quite adamant I had seen that girl", she said.
Before heading to New Zealand, she was in an organised group heading through South America for six weeks.
"She has not returned to her hostel room in Auckland, New Zealand, and family members have had no contact since Saturday 1st December".
"We are working with the family in the United Kingdom and New Zealand Police in relation to reports of a missing British national in New Zealand".
A number of unconfirmed sightings have been reported to detectives.
She was wearing a black dress and what was believed to be white Converse trainers.
It was her first time travelling solo.
"There have been a few tips and we will be working through them".
He told Checkpoint Ms Millane has been in New Zealand since late November and was last seen at 7pm on Saturday night at Sky City on Victoria Street in Auckland's CBD.
Miss Millane, from Essex, was last seen at Auckland's Sky City complex and did not respond to messages on her birthday the following day.