Director Sir Peter Hall has apologised to Downton Abbey actress Laura Carmichael after he "unintentionally disrupted" her West End debut.
Audiences at the opening night of Chekhov's Uncle Vanya on Friday heard Sir Peter speaking in the stalls during the play's final scene.
Reports over the weekend suggested Sir Peter had been "heckling" the actors.
In a statement, however, the 81-year-old said he had been "disorientated" after falling asleep.
"I am mortified that I unintentionally disrupted the final scene of Uncle Vanya and I have sent a personal note to Laura Carmichael offering my apologies," Sir Peter said.
"I enjoyed the evening, and her performance, immensely, and I cannot stress too strongly that my remarks were in no way directed at her or the production.
Being rather aged I dropped off for a moment and on being woken by my wife I was briefly disorientated”
"Remarks made in the resulting confusion were not in any way related to Uncle Vanya, which I think is a very fine production with a marvellous company of actors."
Carmichael, who plays Lady Edith Crawley in ITV1 drama Downton Abbey, was making her first appearance in London's West End in a new version of Chekhov's classic at the Vaudeville Theatre.
The actress continued to deliver her emotional closing speech despite the disruption. She then joined the rest of the cast - including Ken Stott, Anna Friel and Samuel West - for the curtain call.
Newspaper reports on Sunday suggested that Sir Peter had heckled Carmichael from the stalls with the words: "It doesn't work and you don't work. It is not good enough. I could be at home watching television."
BBC reporters who attended the opening night said there was confusion in the auditorium as to who had spoken and the nature of what was said....