Matt Smith is giving one fan the chance to meet him for afternoon tea at The Ritz.
The Doctor Who star, who will be leaving the role in December, is offering the experience as part of an auction for two autism charities.
Bidding on the afternoon, which will be for the winner and a friend, has already begun on sellebrity.org.uk.
The website auction will be frozen at 11.10am on Monday, July 1, where all bids will be carried over to the evening event, which starts at 8pm.
Bidding on the website prior to this means that fans will be able to telephone the auctioneer’s assistant during the auction to make their final bids.
All proceeds from the evening will be split equally between two charities - Ambitious about Autism and The National Autistic Society.
Smith will be seen next in Doctor Who's 50th anniversary special before leaving the sci-fi series during the Christmas episode.