Wilfried Zaha is expected to return for Crystal Palace after missing the last three games with a hamstring injury.
Bakary Sako has also been passed fit for Palace, whose only absentee is midfielder Joe Ledley.
Matteo Darmian, Morgan Schneiderlin and Marcos Rojo return for Manchester United after missing out in midweek.
Marouane Fellaini is back after a ban, but Adnan Januzaj and Timothy Fonsu-Mensah are unlikely to be fit. Bastian Schweinsteiger and Luke Shaw are out.
Who do you think should start the FA Cup final? Step into Alan Pardew's shoes and pick your XI - and then share it with your friends using our brand new team selector.
Who do you think should start the FA Cup final? Step into Louis van Gaal's shoes and pick your XI - and then share it with your friends using our brand new team selector.
The echoes of the last FA Cup final between these sides 26 years ago reverberate loud and clear around Saturday's rematch.
This is only the second time Crystal Palace have reached the final and on both occasions Manchester United have been the opponents, while Alan Pardew has been a key component of both Palace sides - as a player in 1990, and now the manager.
The first time around, Palace faced a Manchester United side led by an under-pressure Alex Ferguson in need of his first piece of silverware. The second instalment sees Louis van Gaal in a similar scenario although, unlike Ferguson, lifting the trophy may not be enough to save his job - he is odds on to be replaced.
That initial triumph under Ferguson was the first of five FA Cup wins for United in 15 seasons, and victory this weekend would be their 12th overall, moving them level with Arsenal at the top of the all-time list.
It has been 38 years since there were first-time champions in both the top flight of English football (Nottingham Forest) and the FA Cup (Ipswich), but after a season when Leicester have already upset the apple cart, who would bet against Palace following suit and winning a major trophy for the first time in their 110-year history?
Crystal Palace manager Alan Pardew: "They keep the ball really well. We're going to have to be patient at times.
"We are going to be the side that needs to fight that bit harder to win, I don't think there's any doubt about that.
"We have got areas of the pitch where I think we're slightly superior and we've got to make those areas count."
Manchester United manager Louis van Gaal: "Always your starting point is to impress and perform well.
"That depends on a lot of factors, including your opponent. Then you get a fantastic match. Our starting point is to win well and score beautiful goals.
"But if we win 1-0 that is also enough. Winning is the most important thing in a final, otherwise you have nothing."
United will be in control of the ball and therefore they will be in control of the game.
For Palace to win they will need their whole team to function pretty much as well as they can do and I don't think they are playing well enough for that to happen.
Their league form this year is awful and part of that is their lack of clean sheets - they have managed only two in 19 matches in the league this year. I don't see them keeping United out.
Prediction: 2-0 to Manchester United
Lawro's lowdown on Crystal Palace v Manchester United
Head-to-head
Crystal Palace
Manchester United