Robbie Henshaw will Associate Bundee Aki on Saturday of the World Cup in Japan in Irelands Pool A decider against Samoa at Center.
The British and Irish Lions powerhouse has missed all three of Irelands World Cup games so far, in practice weeks later landing in Japan, with picked up a hamstring injury.
But the 26-year-old is healthy and ready to fire into a game Ireland needs to win with a bonus point to guarantee their place.
The majority of their large guns has rolled out to have the bodily and attacking Samoans, although Jordan Larmour has slotted in at full-back in place of Rob Kearney.
Tadhg Beirne replaces his Munster colleague Peter OMahony in blindside flanker, together with boss Joe Schmidt keen to alleviate the workload on the British and Irish Lions back-rower.
While Joey Carbery carries a seat on the seat, together with Ireland buoyed to have both play-makers back to full 26, johnny Sexton starts at fly-half .
Ireland: 15 Jordan Larmour, 14 Keith Earls, 13 Robbie Henshaw,12 Bundee Aki, 11 Jacob Stockdale, 10 Jonathan Sexton, 9 Conor Murray, 1 Cian Healy, 2 Rory Best (c), 3 Tadhg Furlong, 4 Iain Henderson, 5 James Ryan, 6 Tadhg Beirne, 7 Josh van der Flier, 8 CJ Stander
Replacements: 23 Andrew Conway, 16 Niall Scannell, 17 Dave Kilcoyne, 18 Andrew Porter, 19 Jean Kleyn 21 Luke McGrath, 22 Joey Carbery
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