Henrik Larsson marked his last competitive game in a Celtic shirt with two goals as Martin O'Neill's men came from behind to beat Dunfermline 3-1 in the Tennent's Scottish Cup final.

The Swede netted twice after the break and Stilian Petrov made sure late on with the third to enable the Hoops fans to celebrate a league and cup double.

But the victory was not achieved without controversy as a handball in the Celtic box by Bobo Balde with the score at 1-0 to Dunfermline was missed by referee Stuart Dougal just seconds before Larsson scored his first.

Jimmy Calderwood's side put in an excellent battling performance and deserved their half-time lead courtesy of Andrei Skerla's header.

Gary Dempsey, who scored the winner at Parkhead in the league match, fired an early free-kick inches over and many of the Pars fans at the other end thought it had gone in.

Then a fine passing movement opened up the Celtic defence, although Stevie Crawford spoiled all that good work with a hurried finish.

Celtic had the majority of the possession and there was plenty of defending for Dunfermline to do but few clear-cut chances came the champions' way in the first period, with Chris Sutton appealing in vain for a penalty after a bump with Skerla.

Larsson also had a forlorn appeal when a poorly-timed free-kick hit an arm in the wall just before half-time.

Other Dunfermline chances had come and gone before Skerla opened the scoring to everyone's surprise.

Didier Agathe's inability to defend almost cost his side in the 21st minute when he failed to cut out a long, diagonal ball to the back post from Pars skipper Barry Nicholson.

Craig Brewster took the ball down to fire in a shot but Marshall made a smart stop to deny the 38-year-old.

Within seconds Richie Byrne's long ball had sent Crawford beyond the Celtic backline but his lob did not have the beating of Marshall.

Celtic's best chance of the first half was created and missed by Alan Thompson, who exchanged passes with Sutton to stroke the ball inches wide of Derek Stillie's left-hand post.

Aaron Labonte made a fine tackle on Petrov in the box when there was no margin of error before Brewster was booked for climbing over Neil Lennon in the 29th minute.

Petrov had the ball in the net in the 34th minute but the linesman indicated Larsson had fouled Labonte in the build-up.

A corner was delivered to Lithuanian Skerla who was a long way out when he headed Dempsey's delivery goalwards but, although Derek Young and Agathe were close to him on the line, there was no reason why the Celtic goalkeeper should have allowed the ball to drop into the net.

Dunfermline were ecstatic and Dempsey sent a rasping long-range shot just over.

Celtic roared back after the break and Stillie was called into action twice by his own team-mates, first when he punched a clearance that bounced back off Byrne and when a free kick was deflected off Labonte.

Gary Mason hacked off the line from a corner and Stillie made tip-overs, punches and catches before finally picking the ball out of the net in the 58th minute.

The Pars had gone up for a corner but when that was booted downfield only Labonte was there to challenge Larsson. He slipped at the crucial moment and could only watch as the Swede disappeared to curl the ball effortlessly past Stillie.

However, the ball had hit Balde's outstretched arm from the corner, which was spotted by the Pars players but not the referee.

Darren Young was booked in the 65th minute before Larsson made it 2-1 six minutes later with a peach of a finish.

The striker received the ball with his back to goal from Thompson and turned Labonte from just inside the box before stroking the ball past Stillie.

Petrov made sure in the 84th minute by accepting a Wallace pass and, after negotiating his way past the luckless Labonte, slotted past the keeper.

Teams:

Dunfermline: Stillie, Darren Young, Skerla, Byrne (Tod 88), Mason (Grondin 82), Nicholson, Dempsey (Bullen 60), Derek Young, Labonte, Brewster, Crawford.

Subs Not Used: Scott Y Thomson, Mehmet.

Booked: Brewster, Darren Young.

Goals: Skerla 40.

Celtic: Marshall, Varga, Balde, McNamara, Agathe, Lennon, Petrov, Pearson (Wallace 58), Thompson, Larsson, Sutton.

Subs Not Used: McGovern, Lambert, Mjallby, Beattie.

Booked: Lennon.

Goals: Larsson 58, 71, Petrov 84.

Att: 50,846

Ref: S Dougal (Scotland).