Scarlets blew Munster away with a first-half blitz as they triumphed in the Guinness Pro 12 final in front of record crowd at the Aviva Stadium in Dublin.
The Welsh side, who last won the title in 2004, surged clear with tries from departing Liam Williams, Steff Evans, Gareth Davies and Tadhg Beirne.
Munster fly-half Tyler Bleyendaal touched down to narrow the gap but Munster trailed a substantial 29-10 at the break.
DTH Van der Merwe, who joins Newcastle Falcons this summer, scored his 50th Pro12 try off the bench for Scarlets try before consolation tries from Andrew Conway and Keith Earls.
The men in red nevertheless had the final say as James Davies went over late on. MATCH REACTION
SOCIAL REACTION
Munster: 15 Simon Zebo, 14 Andrew Conway, 13 Francis Saili, 12 Rory Scannell, 11 Keith Earls, 10 Tyler Bleyendaal, 9 Conor Murray, 8 CJ Stander, 7 Tommy O’Donnell, 6 Peter O’Mahony (c), 5 Billy Holland, 4 Donnacha Ryan, 3 John Ryan, 2 Niall Scannell, 1 Dave Kilcoyne Replacements: 16 Rhys Marshall, 17 Brian Scott, 18 Stephen Archer, 19 Jean Deysel, 20 Jack O’Donoghue, 21 Duncan Williams, 22 Ian Keatley, 23 Jaco Taute
Scarlets: 15 Johnny McNicholl, 14 Liam Williams, 13 Jonathan Davies, 12 Scott Williams, 11 Steff Evans, 10 Rhys Patchell, 9 Gareth Davies, 8 John Barclay (c), 7 James Davies, 6 Aaron Shingler, 5 Tadhg Beirne, 4 Lewis Rawlins, 3 Samson Lee, 2 Ryan Elias, 1 Rob Evans Replacements: 16 Emyr Phillips, 17 Wyn Jones, 18 Werner Kruger, 19 David Bulbring, 20 Will Boyde, 21 Jonathan Evans, 22 Hadleigh Parkes, 23 DTH van der Merwe
Date: Saturday, May 27 Venue: Aviva Stadium, Dublin Kick-off: 18:15 BST (17:15 GMT) Referee: Nigel Owens (Wales) Assistant Referees: David Wilkinson (Ireland), Ian Davies (Wales) TMO: Neil Paterson (Scotland)