Simplify the following text for a Grade 6 native English-speaking person.
Original: In 1862 , Louise 's sister , Princess Alice , married Prince Louis of Hesse ; in 1863 , Albert Edward , Prince of Wales married Princess Alexandra of Denmark ; and in 1866 , Princess Helena married Prince Christian of Schleswig-Holstein .
Simplified: Princess Alice was married to Prince Louis , the future Grand Duke of Hesse , at Osborne on 1 June 1862 . In 1863 , Edward , the Prince of Wales , married Princess Alexandra of Denmark .