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)
Having skippered Scotland to a hard fought 25-13 defeat against England at Twickenham on Saturday, Greig Laidlaw spoke of the frustrations of his side doing so many good things and making real progress as a team but still finishing on the wrong end of the scoreline.
GRTV caught up with Neil McCarthy as he was unveiled as the new Head of Academy. The ex-Gloucester front rower is looking forward to getting to work with the vast arrays of talent in the Academy and across Gloucestershire.
Although understandably disappointed to see Northampton snatch a 33-33 draw with a last gasp try on Saturday, Gareth Evans told GRTV after the game that the result shows how far Gloucester have come as a team this season.
Gloucester scrum half Greig Laidlaw spoke to GRTV after the 33-33 draw with Northampton Saints on Saturday, and the Scotsman described how the hosts played some great rugby, but will rue not holding the lead which keeps them in touch with the top seven.
Although Gloucester could take many positives from the 33-33 draw with Northampton Saints on Saturday, centre Bill Meakes admitted it was a strange feeling at the final whistle with Gloucester having probably done enough to win the game.
Speaking after the 33-33 draw with Northampton Saints on Saturday, David Humphreys admitted that he was happy with many aspects of the team's performance but regretted a missed opportunity to defeat the Premiership champions.
Speaking to the local media this week, Richard Hibbard is relishing his return to the Cherry and White jersey as the hosts take on Aviva Premiership leaders Northampton Saints on Saturday afternoon (ko 3:15pm)
Gloucester Rugby would like to inform supporters about an exciting opportunity for you to raise money for your chosen charity or chosen cause. 2015 is an exciting year for Gloucester, with Kingsholm Stadium hosting four fixtures for Rugby World Cup 2015.
On loan centre Brendan Macken will make his first start for Gloucester Rugby as the Cherry and Whites resume their Aviva Premiership campaign on Sunday when they take on the Sale Sharks at the AJ Bell Stadium.