Defending champions England Under 20 have named their side to take on Italy in their opening game of the IRB Junior World Championship at the ECO Light Stadium in Auckland on Monday, kick off 06:35 (BST) live on Sky Sports.
Moriarty, a key figure in England's triumphant campaign last summer, starts on the flank with Gloucester team mate Billy Burns named amongst the replacements.
England last faced their Italian rivals in their final game of the U20 Six Nations, winning 52-5, but Head Coach Nick Walshe says that that result will have no bearing on this game.
"We're looking forward to kicking off this campaign, we've been in New Zealand for over a week now - the lads are acclimatised and have trained well. They've taken real ownership and can't wait to get out there.
"We did well against Italy in the Six Nations but that game has gone, we're focused on performing well in this game and kick-starting our JWC. "
Captain Callum Braley added:
"We've enjoyed our first week in Auckland but now it's time to get down to business. We're excited about the next five games - there's pressure on us, but we have to use that to our advantage and perform as well as we can."
England Under 20 starting XV against Italy
15 Aaron Morris (Bedford Blues)
14 George Catchpole (Leicester Tigers)
13 Nick Tompkins (Saracens)
12 Harry Sloan (Harlequins)
11 Nathan Earle (Saracens)
10 Sam Olver (Northampton Saints)
9 Callum Braley (Bristol Rugby, captain)
1 Danny Hobbs-Awoyemi (Northampton Saints)
2 Tom Woolstencroft (Bath Rugby)
3 Paul Hill (Leeds Carnegie)
4 Maro Itoje (Saracens)
5 Tom Ellis (Bath Rugby)
6 Ross Moriarty (Gloucester Rugby)
7 Gus Jones (London Wasps)
8 James Chisholm (Harlequins)
16 Jack Walker (Leeds Carnegie)
17 Alex Lundberg (London Wasps)
18 Biyi Alo (Saracens)
19 Charlie Ewels (Bath Rugby)
20 Joel Conlon (Exeter Cheifs)
21 Henry Taylor (Loughborough University)
22 Billy Burns (Gloucester Rugby)
23 Henry Purdy (Leicester Rugby)
Billy Burns contributed all Gloucester's points in the 16-14 European Rugby Challenge Cup win in La Rochelle on Saturday evening, but dedicated the victory to the whole squad whilst also praising the travelling support.
Speaking after Gloucester's brave 16-14 win against Stade Rochelais which clinches a European Rugby Challenge Cup final spot, Director of Rugby David Humphreys paid tribute to the way the team had executed the game plan in a hostile environment against quality opposition.
Greig Laidlaw returns to the Gloucester Rugby squad this week, and his inclusion is an important one after a serious ankle injury. The Scottish scrum half is determined to drive the team forward in their European Rugby Challenge Cup semi final in La Rochelle this Saturday.
Gloucester take on La Rochelle in the European Rugby Challenge Cup semi-final in France on Saturday evening, with the Top 14 side the favourites in the eyes of the bookmakers. However, David Humphreys is looking for his side to rise to the occasion against a familiar opponent.
Speaking to GRTV after Saturday's 39-30 Aviva Premiership win over Sale, Mark Atkinson admitted that the performance wasn't perfect but that the team's character shone through in a game that could easily have slipped away.
Monday evening saw Freddie Clarke in A League action against Exeter, Saturday saw him make his Aviva Premiership debut. And both games resulted in wins! Freddie spoke to GRTV after the 39-30 win over Sale.
Billy Burns will get the headlines for his 16 point haul, but it was a team of heroes who went to La Rochelle and fought like demons to secure a magnificent 16-14 European Rugby Challenge Cup win on Saturday evening.