London’s Vault Festival includes in its theatre/comedy line-up this wonderfully modern take on a tale as old as A Christmas Carol: a depressed man receives a spiritual visitor who helps turn his life around. Mary Poppins. Wilfred from Wilfred. Tilda Swinton.

The Scottish actress (played by Tom “Andrew from Buffy” Lenk by way of Anna Mann by way of Jupiter) arrives at the apartment of the suicidal Walt (Byron Lane) having seen a Craigslist ad for a new roommate and keen to study Walt for her new film in the hopes of winning a second Oscar.

Lenk is a better Tilda Swinton than Tilda Swinton, a note-perfect impersonation that lands huge laughs with every line. Lane’s script is densely packed with jokes, references and uplifting sentiment, as Swinton inspires (or rather bullies) Walt into taking control of his life by talking about herself and her roles.

Tilda Swinton Answers an Ad on Craigslist is on until 17th February and at the time of writing, tickets are still available for the final performance. So if watching Andrew from Buffy playing Tilda Swinton in a venue that’s more or less a dungeon sounds appealing, catch this show. It’s cute as the Dickens.