"It was an error of judgement. This act of mine disappointed many. I regret my action," she said here.
The lady in question, Madhura Nagendra also clarified that she had not done any security breach as she entered the stadium with permission.
Dressed in a red shirt and blue trouser, Madhura was seen walking with the Indian contingent in the march past alongside Beijing Games bronze medallist wrester Sushil Kumar during the opening ceremony. Her unwanted presence has left the Indians fuming as they had no clue as to who she was.
Madhura said she didn't expect this to happen. "I have a lot of spirit and courage, I didn't want to hide from the media," she replied to a query.
Madhura wished all the Indian athletes and said the country would rock the world.
Madhura said she is a dancer and was selected to perform in the opening ceremony of London Olympics.
Madhura's father K Nagendra on Jul 29 had said that his daughter was officially selected for giving a dance performance in the inaugural ceremony by show creator Danny Boyle.
Madhura is a post-graduate student and had studied in Christ College in Bangalore.
Understandably agitated by the incident, India's acting Chef-de-Mission PK Muralidharan Raja had shot off a letter on to the London Games organisers in protest against the incident.