Queen Elizabeth II has a new great-grandchild

Peter and Autumn Phillips at the Castle of Mey on Aug. 2, 2010, in Scrabster, Scotland.

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(CBS/AP) LONDON - Queen Elizabeth II now has a second great-grandchild.

Buckingham Palace says Peter Phillips and his wife, Autumn, have had a baby girl. Isla Elizabeth Phillips, born Thursday, weighed in at 7 pounds and 4 ounces.

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She will be 13th in line to the British throne, after her older sister Savannah.

The palace said Friday that the 85-year-old queen, her husband the Duke of Edinburgh, Princess Anne and Autumn's family are delighted by the news.

Peter Phillips is the son of Princess Anne. He married Montreal-born Autumn in May 2008.