AN appeal to find missing teenager Gaia Pope has been shared with millions of people after getting the support of celebrity Russell Brand.

The stand-up comedian, who has more than 12 million followers, re-tweeted a poster with information about the 19-year-old, who went missing a week ago tomorrow.

Meanwhile, police and members of the public continue to step up their search for the Purbeck teenager, who was staying at an address in Swanage when she disappeared on Tuesday.

CCTV footage of Gaia shortly before she went missing was released by Dorset Police on Friday evening.

The footage shows Gaia running along Morrison Road at 3.39pm on Tuesday.

The last reported sighting of her was at an address in Manor Gardens on Morrison Road, Swanage, at around 4pm on the same day.

Police believe she was wearing a red checked shirt with white buttons, grey and white woven leggings and white trainers.

She has epilepsy, which causes her to suffer seizures, and it is not known if she has her medication with her.

She also does not have her phone with her.

In a statement yesterday afternoon, Purbeck police said door-to-door enquiries had nearly been completed in Swanage.

“Our search efforts have been mainly concentrated in the Swanage area, where we have searched numerous premises, carried out a large number of house to house enquiries, used the police dogs and the helicopter for assistance in searching the harder to reach areas, and every avenue of opportunity is being investigated,” a spokesperson said.

“I want to take this opportunity to also thank the dedicated volunteers that have all worked tirelessly to search the streets of Swanage, produce leaflets and conduct extensive house to house enquiries to help find Gaia. Dorset police has received numerous leads that have been generated from the volunteer enquiries, which have all been followed up by police officers.

“Although the door to door enquiries have nearly been completed in Swanage, I would still like to remind residents to remain vigilant when you are out walking in the countryside, to continue to regularly check your gardens and outbuildings and to support the find Gaia team who are working out of the Purbeck Gazette office in Swanage.”

Hundreds of people have scoured areas of Bournemouth, Swanage, Poole and surrounding areas in the hope of finding Gaia.

‘Missing person’ leaflets with Gaia’s picture on have also been taped to lamp-posts, pinned to noticeboards and left in shops and community halls around the county, and new images of the teenager have been shared on social media.

Cousin Marienna Pope-Weidemann said she was “really appreciative” of everyone helping with the search.

“It's been a massive operation, with police as far as Bristol and Cornwall involved. They are working very hard, and the police we have been working with have been great. The coastguard have been working round the clock, which is incredible.

"The community response has been absolutely amazing too.

"We’ve also had a lot of support from other people in London including Russell Brand, Francesca Martinez, Owen Jones, and Gary Young.

"The volunteer operation in Swanage concluded on Sunday evening, and we're regrouping this morning," she added.

Anyone with information about Gaia’s whereabouts is asked to call 101, quoting incident number 9:179.