The youngster has been hooked on the adventures of the Time Lord since she was three and has turned her bedroom into a shrine to the sci-fi hit.
Lily exterminated the previous Guinness world record set by Ian O’Brien, 57, who hoarded more than 1,573 items of memorabilia.
The young fan, from Swansea, said: “When I broke the record it was awesome. It was the best thing ever.
“I showed all of my friends, and they couldn’t believe it. They were shocked I got a world record. My friends like Doctor Who, but I absolutely love it.”
The fanatic’s collection has cost about £2,000 and includes gifts from family, pals and members of the cast.
Her dad Tom, 54, gave her his old action figures including a white Dalek and a Cyberman.
He also built his daughter a Tardis wardrobe that has been signed by current Doctor, Peter Capaldi, 58, who is set to quit later this year.
Lily added: “My favourite part of my collection is my Tardis wardrobe.
“I have met cast members and have been to watch the show being filmed, too. All I want for Christmas and my birthday is Doctor Who presents.”
The family, including Lily’s brother Ryan, five, sister Rhianna, seven, and 30-year-old stepbrother Tom, watch the show.
Her mum Charlotte, 31, said: “We loved the show but for Lily it was life-changing. By the time she was 10 her room had become a shrine.”
