The 29-year-old started his career with Norwich, where he made more than 200 appearances and was liked until joining local rivals Ipswich on a lucrative Bosman in 2001.
A series of blunders marred his brief career and Marshall was made available on a free transfer. Millwall took the agile keeper on loan when first choice Tony Warner was injured and Dennis Wise made the signing permanent as Marshall showed why he was so highly rated in his Norwich days.
Guadeloupe-born keeper who looks similar to Tony Warner, but has understudied the former Liverpool man for the past four seasons.
Warner's consistency and then the signing of Andy Marshall has restricted Gueret to just 18 appearances, but he has rarely let them down, especially in their Division Two title campaign in 2000-1, when he kept nine clean sheets in 13 games.
He played for Le Mans in France before joining Millwall.
After starting the season as a reserve-team midfielder, Marvin Elliott will end it playing right-back in the FA Cup final.
One of several players to be given a chance by Wise since he replaced Mark McGhee, Elliott offers pace and power.
Still only 19, Elliott has only played at right-back three times for Millwall's first team. Sheffield United's Michael Tonge is his toughest opponent so far, he said; that could change when he faces Ryan Giggs.
Long-serving left-back who will make his 256th and possibly final appearance for Millwall in the FA Cup final.
The former Huddersfield defender, who cost just £10,000, is out of contract in the summer and has rejected Milwall's offer of a one-year deal.
He is an aggressive tackler who is known for his forays down the left wing though, against Cristiano Ronaldo, he may have to focus more on his defensive duties.
American literature graduate Matt Lawrence will lead Millwall out in Cardiff as regular skipper Kevin Muscat is injured and previous captain Stuart Nethercott has left the club.
Lawrence was Millwall's Player of the Year in 2001 when they won the Second Division title, but was playing right back then.
Wise has converted him to a centre back, where he has been impressively solid and his strength in the air was a feature of the semi-final win over Sunderland.
Lawrence has previously had two spells at Wycombe Wanderers, either side of a year at Fulham.
Millwall's Player of the Year boasts a haircut David Beckham rejected but he is more likely to be a target than a taker of set pieces.
Ward is a commanding centre-back whose aerial ability is his major asset. He was former manager Mark McGhee's most expensive signing and cost £500,000 from Watford in 2001.
He played in the Premiership for one season with the Hornets and has been an ever-present for Millwall this year.
Nationality: Northern Irish
Talented young centre-back whose career has been sadly blighted by injuries.
The Northern Ireland Under-21 international returned to the team against Bradford in Millwall's final game of the season, but it was his first game of the season.
A broken leg and a cruciate ligament injury are among the lay-offs which have restricted him to just 62 games for Millwall in six seasons.
One of many products of Millwall's successful youth system, Irishman Alan Dunne is a centre back or right back.
Dunne has recently returned after a month on the sidelines due to injury.
One of Millwall's most inexperienced players, Dunne only has 14 senior appearances to his name so far.
If he recovers from a hamstring injury, Millwall player-manager Dennis Wise will be the oldest player on either side in the FA Cup final.
The 37-year-old captained Chelsea to FA Cup wins in 1997 and 2000 and was in the Wimbledon team who beat Liverpool in the 1988 final.
He doesn't dart down the wing any more, but the veteran still has the passing range to control a game and the fierce tackling to make his presence felt.
He will sit in front of the back four, take the free kicks and corners, galvanise his team-mates and wind up his opponents.
A left-footed midfielder who joined Millwall from Arsenal, where he came through the youth system but never played for the first team.
He has been a regular in the Lions team for the past five seasons, playing more than 200 games while his commitment in the tackle has made him a major contributor to their disciplinary record, as 10 bookings and a sending-off this year shows.
Livermore can play on the left or in the centre of midfield and, though he will ostensibly be on the flank in Cardiff, he will join manager Wise in sitting back more so Tim Cahill and Paul Ifill can attack.
There are few more prolific midfielders than Tim Cahill, who is deceptively good in the air and, like Paul Scholes, specialises in making well-timed late runs into the penalty box.
Cahill scored in both the quarter-final and semi-final wins and his tally of goals for the season (12) almost matches his yellow cards (14, plus two dismissals).
The Australian came to England at the age of 16 and an appearance at youth level for Samoa, plus a wrangle with FIFA, delayed his first Socceroos cap until earlier this year.
But for the injury that forced him to miss most of the 2002/03 season, Cahill might already have left Millwall. As it is, he will line up in the centre of midfield in a formation that can become a diamond when he goes forward.
Right winger Paul Ifill is, like Cahill, one of the Millwall players with the potential to play at a higher level and the FA Cup final could prove the ideal shop window for the 24-year-old.
Very quick and a mazy dribbler, Ifill is likely to start on the right of midfield, though he has also been deployed as a second striker.
He set up Cahill's semi-final winner against Sunderland and has an eye for goal himself, too, with nine in 38 games this season.
A likely substitute on Saturday, teenager Peter Sweeney offers a more attacking alternative to David Livermore on the left flank.
Sweeney is another to come through the ranks at the New Den and he has featured regularly since Wise took charge, though 17 of his 40 career appearances have been from the bench.
He previously played for England Schoolboys, but his performances this season have earned him a first call-up for Scotland Under-21s.
Bruising target man whose presence in the FA Cup final may even shock McCammon himself, scorer of a mere 17 goals in seven years of professional football.
After spells with Cambridge, Charlton and Brentford, he was surprisingly signed by Mark McGhee last season on a free transfer and, though he has scored just two Millwall goals, is the likely deputy for the banned Daniele Dichio.
McCammon, who last played at the Millennium Stadium in Brentford's defeat in the 2001 LDV Vans Trophy final, is not technically the best, but can cause problems with his physique.
Nicknamed 'Bomber', Neil Harris' popularity at the New Den dates back to his goalscoring exploits in Division Two, but he will benefit from neutrals' support on Saturday for very different reasons.
Plucked from non-league Cambridge City, Harris scored 52 goals in two seasons, culminating in Millwall's promotion to the First Division.
But in 2001, the prolific Harris was diagnosed with testicular cancer. Thankfully, he has recovered and returned to football by the end of that season.
He demonstrated his goalscoring instincts with a superb volley against Tranmere in the quarter-finals and captained the team in the semi-final, though Matt Lawrence will lead them against Manchester United.
Younger brother of Celtic striker Chris, John Sutton is one of the few Dennis Wise signings in the Millwall squad.
Valencia were reported to be interested in Sutton when the 20-year-old joined Millwall from Raith Rovers in January.
He scored 16 times in 21 games for Raith this season, but is still looking for his first Millwall goal.
On-loan forward who could become the first Everton player to win the FA Cup for nine years.
Chadwick is Everton's seventh-choice forward, but has not scored a league goal for his owners for more than two years.
The target man is in his second loan spell of the season at Millwall and has scored four goals for them so far.
Nationality: Northern Irish
Northern Irish striker Kevin Braniff scored Millwall's first goal of their FA Cup campaign, an equaliser after Walsall took the lead in their Third Round tie.
Since then, the 21-year-old's only experience of the FA Cup has been as a substitute, his probable role on Saturday.