It's all over for pixie-ish Liv Tyler and her husband of four years, Royston Langdon.

Liv's rep told People, "Liv Tyler and Royston Langdon have confirmed their separation."

Royston is the former bass player and vocalist of the UK band Spacehogg.

Liv is the daughter of still-living Aerosmith guru Steve Tyler.

Uh, Liv. rock star?  What were you thinking?

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