Jiimmy Carr has apologised for his "terrible error of judgment" over his tax arrangements.
He spoke out after Prime Minister David Cameron branded his tax dodging "morally wrong".
The comedian released a statement saying: "I appreciate as a comedian, people will expect me to 'make light' of this situation, but I'm not going to in this statement as this is obviously a serious matter.
"I met with a financial advisor and he said to me 'Do you want to pay less tax? It's totally legal'.
"I said 'Yes'.
"I now realise I've made a terrible error of judgment.
"Although I've been advised the K2 Tax scheme is entirely legal, and has been fully disclosed to HMRC (Her Majesty's Revenue and Customs), I'm no longer involved in it and will in future conduct my financial affairs much more responsibly.
"Apologies to everyone," he added.
Speaking during a visit to Mexico, Mr Cameron had joined a chorus of criticism of the comedian, whose tax arrangements were revealed in The Times on Tuesday.
Describing them as "straightforward tax avoidance", the PM said it was unfair on the people who pay to watch the comic perform that he is not paying his taxes in the same way that they do.