Billy & Naomi OH WATT A WEDDING!

The actors delight friends - and fans - by tying the knot in New York

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A New York courthouse and "flowers from the deli" - simplicity was at the heart of Naomi Watts and Billy Crudup's sweet wedding ceremony on June 9.

Friends say the actress - who tied the knot in a $7400 white Oscar de la Renta Sweetheart Water Lilly Guipure lace gown - "couldn't be happier" and "loved every bit of being the bride" after finally saying "I do" to her beau of six years.

While details of the postnuptial celebrations are being kept hush-hush, an insider says, "Everyone was there."

As well as celebrating with celebrity friends including Mark Ruffalo, Sunrise Coigney, Josh Hamilton and Lily Thorne, a number of the stars' famous pals also sent their congratulations - including their exes Mary-Louise Parker, 58, and Liev Schreiber, 55.