Keira Knightley says karaoke is her ''idea of hell''.

The 'Begin Again' actress - who plays aspiring singer Greta in the upcoming comedy-drama - took vocal lessons for the movie and insisted she won't be seen singing in a bar.

She told the New York Post newspaper's Page Six column: ''I hate karaoke. It's my idea of hell.''

Keira recently joked while she was pleased with her voice in the movie, she wanted to ''sound like Adele'', adding that when she sings in the shower she likes to think she's the 'Rolling in the Deep' hitmaker.

She previously said: ''I had actually done it on one other movie but in a very different style, but no, I've never sung like this. I was actually quite disappointed that I didn't sound like Adele.

''You know when you're in the shower and you're just singing and you think, 'Wow, I sound really good right now. I sound so good I could totally do that Adele thing'. And then you get into a recording studio, as I did, and you think, 'Oh, no, I can't do the Adele thing'.''