Callum Wilson will make his England debut as they attempt to defend their Wellington Sevens title this weekend.
The former Loughborough student and 2011/12 series top try-scorer Mat Turner replace Christian Lewis-Pratt and Alex Gray for the global tour's fifth leg at Westpac Stadium.
Wilson, 23, impressed for England against Wales during their pre-season preparations at Bath University.
England Sevens head coach Simon Amor said: "It's a good opportunity for Callum. It's his first tournament in international sevens. He's got lots of potential and lots to learn.
"He's a big guy and he'll add his physicality to the team, while Mat Turner's a super talent and this is a great chance for him to come back in and make an impact."
England sit fourth in the overall series rankings and Amor is hoping for an improved performance on last month's outing in Las Vegas, where they won the Plate and finished fifth overall.
"It's important to understand that this is a different team in a different year," said Amor.
"What's important for us now is taking steps forward and improving on our performance in Las Vegas.
"We showed some glimpses of what we can do there but overall we didn't perform at the levels we aspire to.
"The habits are not in place yet and we've got to concentrate on the fundamentals of our game to make progress."
England will face Portugal, Wales and South Africa in the Wellington pool stages on Friday.
"South Africa are a fantastic team with lots of powerful players and they're playing a good style of sevens," said Amor.
"They'll be a big challenge for us but at the same time Wales and Portugal are equally difficult to play and hugely physical, so it'll be a great test."
England Sevens: Dan Bibby, Phil Burgess, Chris Cracknell, Mike Ellery, Tom Mitchell (captain), Dan Norton, James Rodwell, Tom Powell, Mathew Turner, Marcus Watson, Jeff Williams, Callum Wilson.
Watch the Wellington Sevens live on Sky Sports 3 from 4.30am on Friday