Kelvin played Andy Sugden for 20 years in ITV drama Emmerdale, and has known his now wife since he was eight-years-old.
Elizabeth added: “I can imagine it’s difficult for people who aren’t in this industry.”
The couple tied the knot in a secret ceremony on November 28, 2015, with their daughter Marnie being born the following August.
They are also parents to son Milo, who they welcomed into the world a year ago this month.
Strictly Come Dancing airs tonight at 7.05pm on BBC One.