Steven Grygelko, 55, was known by their stage name Heklina, was discovered dead by their co-star, Peaches Christ, on April 3, 2023.
Peaches Christ wrote on Facebook: “I am shocked and horrified to bring this news to you.
“I am living in a real-life nightmare so forgive me if I don’t have all the answers just now.
“This morning, in London, England I went to collect my dear friend Heklina, who is costarring with me in a Mommie Queerest show here, and found her dead.
“I do not know the cause of death yet.
“I know this is shocking news and I am beyond stunned, but I wanted to let folks know what has happened.
“Heklina is not just my best friend, but a beloved icon of our community.”
Three men are known from CCTV to have been at the flat in the early hours of the morning of their death.
Officers investigating the case are treating the death as “unexpected” as they work with the coroner and have asked the three men to come forward.
Heklina was born in Minneapolis and was in London for the show Mommie Queerest, a parody of Mommie Dearest due for a two-week run at Soho Theatre.
Detective Chief Inspector Dean Purvis, from the Central West Command Unit, said: “Our thoughts are with Steven’s family and friends who still have a lot of unanswered questions about what happened to him.
“We know that the three men in the CCTV images were at the flat in the early hours of 3 April 2023.
“I am asking them to contact police. We need to establish what happened, and how Steven was when they left.
“If you recognise any of the men, I would encourage you to let us know who they are.”
Anyone with information is asked to call 101 quoting CAD 1824/03Apr23.