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 to GRTV after the game, Director of Rugby David Humphreys spoke of his delight in securing a 28-6 win over Harlequins at Kingsholm. He hailed the home side's defence which they were quick to turn into attack.
Speaking to the local media, Bill Meakes this week explained how he was relishing the challenge against Harlequins at Kingsholm, and that he is enjoying the opportunity to develop his game time, and repaying the faith from the Cherry and White coaches
Gloucester look to build upon the local derby win over Bath last weekend with Harlequins the visitors to Kingsholm on Saturday (kick off 3pm). Director of Rugby David Humphreys is expecting a close game with the two teams well matched, although it may not be a 78 point thriller like the last time the two teams met.
Named Man of the Match by BT Sport, scrum-half Willi Heinz said after the 15-11 win at Bath on Friday evening that it was a pretty happy Gloucester dressing room and reward for a lot of hard work put in during the week leading up to the game.
Speaking after the 15-11 win over Bath at the Rec on Friday evening, David Humphreys heaped praise on his players, pointing out how they had bounced back after last week's tough defeat to overcome a rough start before controlling the game and earning the win.
Gloucester Rugby hooker Richard Hibbard spoke to the local media this week as the Cherry and Whites prepare to face Bath Rugby in the Aviva Premiership. The Welshman is ready to bounce back at The Rec.
Speaking to the local media about the local derby against Bath at the Rec on Friday evening, Director of Rugby David Humphreys acknowledged that it will be a tough encounter but hugely exciting at the same time and one the squad are looking forward to.
A visibly disappointed Billy Twelvetrees admitted that it was a very sombre Gloucester dressing room as a last minute try and conversion condemned the Cherry and Whites to an 18-19 defeat against Leicester Tigers on Saturday.
After a disappointing opening weekend loss to their Scottish counterparts, England U20s will be eager to bounce back in Italy this evening, with Gloucester flyer Mat Protheroe set to pull the strings from fly half.
Gloucester Rugby make just the one change to the starting line up that won at Bath last Friday evening, flanker Matt Kvesic restored to the starting XV as the Cherry and Whites welcome Harlequins to Kingsholm in the Aviva Premiership on Saturday (kick off 3pm).
The Early Bird deadline for ticket purchases for the Aviva Premiership fixture against Harlequins on Saturday will expire at 6:30pm on Thursday evening, with tickets already limited for one area of Kingsholm.