The Alfie star reportedly ignored Dan Kovacs' request for ID at the entrance and ordered a drink before she was asked to leave.
Although Miller insists her comments were misconstrued, she does confess her tight filming schedule had left her feeling exhausted and irritable.
She says, "I'm very sorry about being rude but I was working so hard on the movie The Mysteries of Pittsburgh.
"I was really tired and it came out wrong. I feel terrible about it."
Miller recently apologized for referring to Pittsburgh as "S**tsburgh" in an interview with Rolling Stone magazine, claiming her words were taken out of context.
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