The groom also shared a 'gram with family and friends before the destination wedding.
Actress Laura Haddock shared a sweet photo from the reception, writing, "some jobs and some people steal a forever place in your heart.. this lot are that people. such a beautiful weekend spent celebrating love and complete happiness.. ❤️ "
Lizzy, 35, and Riley, 36, announced their engagement in May 2016, only a few short months after making their first red carpet appearance together. They met in January 2015 while Caplan was filming in London.