Liv Tyler, husband Royston Langdon, and son Milo go out for lunch to celebrate Liv's 30th birthday. West Village, New York City - 01.07.07

Tyler, 30 and Langdon, 36, married in the Caribbean in 2003 and have a four-year-old son, Milo, together.

The actress's representative tells People.com, "Liv Tyler and Royston Langdon have confirmed their separation. They remain good friends and devoted parents to their son Milo and are requesting that their family's privacy be respected at this time."

Tyler prompted speculation of a split when she arrived at the glitzy New York Costume Institute Gala on Monday (5May08) without a wedding ring.

Source: WENN