The first snaps of Neil Patrick Harris and his partner David Burtka holidaying with their twins, Gideon and Harper alongside Sir Elton John, David Furnish and their son Zachary have emerged online.

The trip to St Tropez, which is something of a favourite haunt for Elton and David, saw the couples happily posing for photos on the deck of their yacht. The seven-some waved and smiled at photographers as they boarded the vessel at the start of their Mediterranean holiday.

Both NPH and Burtka and Elton and Furnish had their children through surrogacy, with Harris and his partner announcing that they were expecting twins via a surrogate mother back in August 2010.

News has recently emerged that Elton and David are planning on having their second child together through surrogacy. During a recent appearance on the ITV daytime show Daybreak, Elton said that he and David are "definitely' going to be adding to their brood in the future," adding: "At what stage we don't know, but we definitely will. I don't want him to be an only child."

The surrogate mother of the pair's children also happens to be the surrogate mother of Kelsey Grammer and his wife's children, and will be taking on responsibilities with the pair's next child.