The 37-year-old married Herman, 32, on January 5 at Alisal Ranch and Resort in California's Santa Ynez Valley, reported dailymail.co.uk.
Some guests who were a part of the ceremony were "Downton" co-stars Michelle Dockery and Dan Stevens and his "Bohemian Rhapsody" co-star Rami Malek, while "Glee" star Lea Michele and Darren Criss performed at the party.
He told Hello! magazine: "That moment of seeing Jessica, oh my God, it was magical. It will stay with me forever."
The couple had envisaged a sun-kissed wedding for their California ceremony, which was officiated by Herman's mother, but they ended up having heavy rainfall on the day.
Leech and Herman suffered a setback when the string quartet they had hired could not perform due to the rain.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)