Green wed Megan Fox in Hawaii last month (Jun10).
The couple's son, Kassius, attended both weddings.
The news adds to a packed weekend of celebrity nuptials - Carrie Underwood, TV presenter La La Vazquez and Martin Lawrence all wed in America on Saturday (10Jul10) and actors John Krasinski and Emily Blunt exchanged vows in Italy.
Marcil was previously married to actor Corey Feldman.
The actress has already adopted her new husband's name and will now be credited as Vanessa Marcil Giovinazzo.