The legendary singer and his partner will marry in an English registry office in May, Furnish told the Las Vegas Review Journal Friday at John's birthday party at Fizz Las Vegas (which the crooner created) in Caesars Palace.
The couple already entered into a British civil partnership eight years ago, throwing a big bash at their home in London to celebrate at the time. But, given that Friday marked the first day gays were allowed to tie the knot in England, they've decided to say "I Do" once again.
"We don't feel the need to take an extra step legally," Furnish said. "But since we're committed for life, we feel it's really important to take that step, and take advantage of that amazing change in legislation. We all live by example."
"If the laws are gonna help us again, as a famous gay couple we will do it. It's our duty to do it to make sure everyone knows that this is something that's a gift that we never dreamed we'd ever get," John said on Jimmy Kimmel Live.
Although their civil partnership celebration was extravagant, the duo plans to have a low-key ceremony this go-round, with their two kids, Elijah and Zachary, in tow.
As for John's star-studded birthday bash, guests like Kelly Osbourne, Sharon Osbourne, Quincy Jones, Nicolas Cage, David Spade, Nicolas Cage and more, sang Happy Birthday to him as a three-tiered birthday cake was delivered.
In addition to the dessert, guests also enjoyed specialty cocktails like the FIZZ Noir as they mixed, mingled and danced throughout the night.