Swansea City are Champions of League One.
Despite suffering a 2-1 defeat at home to Yeovil at the Liberty Stadium, the Swans were still celebrating in front of a packed house at the end of the game.
With Swansea's rivals Carlisle slipping up 2-1 at home to Southend, it left the Swans seven points clear at the top of the table with just two games to go.
Yeovil went ahead with a first-half goal from Terry Skiverton before Aiden Downes put them 2-0 up after the break.
But Andy Robinson put the Swans back into contention with 13 minutes remaining as the Swans piled on the pressure in search of the equaliser.
The Swans looked stunned at the end of the game until news came through that Carlisle had lost and the party kicked into full swing.
The players came out at the end of the game for a lap of honour as the Champagne corks popped and the thousands who had stayed behind chanted the name of Swans boss Roberto Martinez who received the biggest reception of them all.
Swansea City:
de Vries, Tate (c), Austin, Williams, Lawrence, Butler, Pratley, Britton, Robinson, Scotland, Brandy. Subs: Monk, Tudur Jones, Bauza, Way, Anderson.Yeovil Town: Mildenhall, Skiverton (c, Forbes, Barry, Stewart, Peters, Bircham, Peltier, Smith, Williams, Downes. Subs: Guyett, Owusu, Jones, Behcet, Kirk.
Ref: M P Russell
Asst-refs: R J Martin, L Swabey
4th official: A Matthews
Att: 18,321 Away: 359
Swansea made three changes to the side that clinched promotion at Gillingham last Saturday with Kevin Austin, Febian Brandy and Tom Butler coming in for Marcos Painter, Guillem Bauza and Paul Anderson respectively.
With the Swans needing one more win to clinch the title, club captain Garry Monk also made his long-awaited return from a back injury with a place on the bench.
There was a packed house at the Liberty Stadium as Swansea made a bright opening against a Yeovil side who were still looking to secure their status in League One.
Darren Pratley drilled a dangerous cross across the face of goal in the first two minutes which Yeovil scrambled clear, before Andy Robinson tried his luck from the edge of the area with a swerving shot whick 'keeper Steve Mildenhall somehow managed to push behind for a corner with five minutes gone.
Swansea won another corner in the 12th minute which Leon Britton whipped in after receiving in short from Robinson. Ashley Williams met it with a great header which skipped the top of the crossbar.
But having dominated the entire opening period, the Swans found themselves behind with 24 minutes gone.
Marvin Williams found space on the outside of Kevin Austin before delivering a cross which just eluded Ashley Williams for Yeovil skipper Terry Skiverton to arrive at the back post to head beyond Dorus de Vries.
It knocked the wind out of Swansea's sails as Yeovil nearly snatched a second in the 31st minute when de Vries was forced to pull off a fine save from a Marcus Stewart header.
Williams headed a Robinson corner just wide before the break, but the Swans trailed in at half-time 1-0 down.
Half-time: Swans 0 Yeovil 1
Neither side made any changes at the start of the second-half as Yeovil nearly increased their lead in the 59th minute when de Vries saved a close-range header from Stewart.
But Swansea didn't take the warning on board and a minute later Yeovil were 2-0 in front when Aiden Downes fired home from the edge of the area.
Downes was booked four minutes for kicking the ball away as Swansea were looking ragged and shell-shocked.
Marc Bircham followed him into the referee's notebook a minute later for a foul on Leon Britton on the edge of the area.
Robinson fired the free-kick straight at Mildenhall.
Swans boss Roberto Martinez looked to change things around in the 70th minute with a double substitution as Paul Anderson and Guillem Bauza replaced Tom Butler and Kevin Austin respectively.
With 14 minutes left and Swansea still looking for a way through a resolute Yeovil defence, Yeovil brought on full-back Nathan Jones for Downes.
But the breakthrough Swansea wanted arrived in the 78th minute when Andy Robinson met an Anderson corner. His first effort was blocked on the line, but Robinson reacted to fire the rebound home.
Swansea were piling on the pressure now as Bauza fired wide, while at the other end Anthony Barry blazed a glorious chance wide with five minutes to go.
Darren Pratley received his marching orders in the 90th minute for a professional foul on substitute Lloyd Owusu as the Swans were reduced to 10 men.
It didn't matter though as news came through that Carlisle had lost 2-1 at home to Southend, making Swansea City champions of League One.
