Photos from outside St. Charles's Church show the sisters with their husbands and children, attending the Austrian celebration instead of the Buckingham Palace parade, according to Kronen Zeitung.
Beatrice arrived with husband Edoardo Mapelli Mozzi and daughters Sienna, 4, and Athena, 1, and is stepmother to Christopher 'Wolfie', 10. Eugenie attended with Jack Brooksbank and sons August, 5, and Ernest, 2; the couple recently revealed they are expecting a third child.