DAISY WRIGHT, 26, recently told a UK tabloid that she had a month-long affair with the ALFIE star while he was filming war movie All the King's Men in America earlier this year (05).
And in answer to the reports, Law has confirmed that he was unfaithful to Miller, to whom he proposed on Christmas Day 2004.
He says in a statement: "Following the reports in today's papers, I just want to say I am deeply ashamed and upset that I've hurt Sienna and the people most close to us.
"I want to publicly apologise to Sienna and our respective families for the pain that I have caused."
Blonde beauty Miller, 23, has yet to comment on the statement.
Law divorced Sadie Frost in October 2003 after a six-year marriage and three children.18/07/2005 09:29