Lome Fa'atau, Justin Va'a and Opeta Palepoi are in Justin Marshall's squad that will take on a team selected by Williams.
Shane Williams XV: Morgan Stoddart (Llanelli Scarlets); Tom James (Cardiff Blues), Tom Shanklin (Blues), Sonny Parker (Ospreys), Shane Williams (Ospreys); James Hook (Ospreys), Andy Williams (Newport-Gwent Dragons); Gethin Jenkins (Blues), Huw Bennett (Ospreys), Adam Jones (Ospreys), Alun Wyn Jones (Ospreys), Ian Gough (Ospreys), Dafydd Jones (Scarlets), Jonathan Thomas (Ospreys), Ryan Jones (Ospreys).
Replacements (from): Warren Fury (London Irish), Andrew Bishop (Ospreys), Jamie Roberts (Blues), Stephen Jones (Scarlets), Bradley Davies (Blues), Ian Evans (Ospreys), Duncan Jones (Ospreys), Rhys Thomas (Dragons), Matthew Rees (Scarlets).
Justin Marshall squad: Justin Marshall (New Zealand), Ryan Powell (Wales), Ceri Sweeney (Wales), Ben Foden (Sale Sharks), Elvis Seveali'i (Samoa), Ollie Smith (England), Lome Fa'atau (Samoa), Uche Oduoza (England 7s), Paul Emerick (USA), Freddie Tuilagi (Samoa), Deacon Manu (Llanelli Scarlets), Allan Jacobson (Scotland), Mahonri Schwalger (Samoa), Ed Shervington (Ospreys), Kevin Yates (England), Justin Va'a (Samoa), Justin Harrison (Australia), Maama Molitika (Tonga), Opeta Palepoi (Samoa), Hale T Pole (Tonga), Marty Holah (New Zealand), Filo Tiatia (New Zealand), Isaac Feaunati (Samoa).