A Doctor Who pop-up shop has materialised in Brisbane, but unfortunately for the hundreds who lined up at its opening, it was not bigger on the inside.

Fans of the long-running BBC television series Doctor Who, which celebrates its 50th year this year, waited for hours to get inside.

Sampy Stevenson, 24, looked the part in a TARDIS costume. She arrived at 5am to be sure she was at the head of the queue.

"I thought it was just the first 20 people in line get a prize, but then on the website it said the first 20 in costume so it was a bit of a freak out, like 'oh my God, what's the easiest thing to do?'," she said.

"It's good to see the kids get into it, because it's been going since the '60s. My dad saw me making this and he got pretty excited."