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)
Speaking after the game, Charlie Sharples described it as 'the win that has eluded us.' The winger stressed that Gloucester had stayed positive after the first couple of weeks of the Aviva Premiership season and the 26-13 victory over Sale was a result of that focus.
Gloucester Rugby picked up their first win of the new Aviva Premiership season on Friday night, easing to a 26-13 win on the road at Sale Sharks. Director of Rugby David Humphreys was full of praise for his players on the night.
Defence Coach Jonny Bell was on media duties ahead of the Aviva Premiership fixture at Sale Sharks on Friday evening, and spoke about where Gloucester find themselves in terms of their form at the moment as well as how he's viewing their defensive displays so far.
Callum Braley, who skippered Gloucester United to a 22-19 Aviva Premiership A League win over Saracens Storm on Monday evening, paid tribute to his forwards and the younger players in what he described as not the prettiest of wins.
A desperately disappointing afternoon for Gloucester who, despite dominating possession and territory, were guilty of failing to make the most of it against a resolute Newcastle defence before the visitors pounced to snatch the win in the second half.
Mariano Galarza and Ross Moriarty are both back from injury as Gloucester entertain the Newcastle Falcons at Kingsholm in the Aviva Premiership (Saturday, kick off 3pm). Willi Heinz will skipper the side from scrum-half.