Allison Williams cannot be called a 'girl' anymore having said goodbye to spinsterhood.

The 27-yr-old American actress wed her longtime boyfriend, Ricky Van Veen in Saratoga, Wyoming.

The star of hit comedy series, Girls, announced to her fans the news of her wedding in the early hours of Sunday, sharing photos of the big day which she captioned as '9.19.15'.

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The bride wore a immaculate-white handmade couture Oscar de la Renta gown, and according to Daily Mail, she's said to be the first celebrity bride to receive a wedding gown hand-made by the late designer's creative director, Peter Copping.

Allison and  her boyfriend, CollegeHumor co-founder 34-yr-old Van Veen, dated for three years before announcing their engagement in February 2014.

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Officiating at the star-studded wedding was Hollywood A-lister, Tom Hanks, whose wife - Rita Wilson played Williams' mother in Girls.