DALLAS -- In an instant, it was over.
It took until the NCAA Final Four semifinals but the University of Connecticut women's basketball team finally learned what a difference a year can make.
For 36 games, when the Huskies needed a basket they got one. When they needed a defensive stop, they got one. When they needed a play, they made one.
But it was Mississippi State and Morgan William's turnnight. And UConn's historic 111-game winning streak and their four-year reign as national champions are history.
William's pull-up jumper from about 12 feet at the buzzer in overtime gave the Bulldogs a 66-64 win over UConn before a sellout crowd of 19,202 at the American Airlines Center. It may have not been the greatest game ever played as both clubs had their ups and down, but it will go down as one of the greatest upsets in the 36-year history of the tournament.
"You have to give credit to Mississippi State," UConn All-American Katie Lou Samuelson said. "They came out and played aggressive. The second half was the way we should have played the whole game. But I'm proud of our fight. We got down and did our best to get back and compete for an opportunity to win. That's exactly what we did."
Mississippi State (34-4) will face Southeastern Conference rival South Carolina innight's final. The Gamecocks ousted Stanford 62-53 in first semifinal. It will be the first national championship game between league rivals since UConn defeated Louisville in the 2013 final at New Orleans Arena.
South Carolina won the only regular season game in a controversial ending in Columbia then beat the Bulldogs in the SEC tournament final.
But the Bulldogs provednight they are good at getting revenge. Their win came a year after the Huskies beat them 98-38 in the Sweet 16 at Webster Bank Arena in Bridgeport.
"It was personal," Mississippi State guard Victoria Vivians said. "We got beat by 60 last year and we had to prove we were a better team."
The loss ended UConn's NCAA record winning streak, which started with a victory over Creighton on Nov. 23, 2014. The loss also snapped the Huskies' 40-game postseason run dating back to the 2013 Big East tournament final against Notre Dame.
The Huskies are 11-7 in national semifinals and are winless in four tournament overtime games with the other losses to Tennessee (1996), Duke (2006), and Notre Dame (2012).
"Obviously when you get to this point in the season and you lose it's the worst feeling imaginable," UConn coach Geno Auriemma said. "Mississippi State deserved to win. They beat us. We did have our chances. We didn't have the maturity level that we needed to have to win at this level."
UConn, which had not trailed by more than 11 points in the 111 straight wins, saw Mississippi State run off 14 unanswered points with a Vivians basket making it 29-13. The Huskies did answer with 12 straight points, the last seven from senior Saniya Chong, but Vivians scored the next seven points for the Bulldogs and their lead was 36-28 at the break. UConn did not lead in the first half for the first time since having its 90-game winning streak broken at Stanford on Dec. 30, 2010.
Breanna Richardson opened the second half with a basket for Mississippi State, but a 12-1 run, capped by a hoop from All-American Napheesa Collier, gave the Huskies their first lead at 40-39. Mississippi State regained the edge but a Gabby Williams basket forged a 48-all tie going to the fourth quarter.
The Bulldogs led by four before a 7-0 run put the Huskies ahead. A free throw and 3-pointer by Vivians put the Bulldogs back in front with left. Collier made 1-of-2 free throws with 27.7 seconds to go to tie it at 60 and Williams blocked William's attempt to win it to send it to overtime.
UConn never led in the extra session. Two free throws by Samuelson -- following a Flagrant 1 foul on Mississippi State's Dominique Dillingham -- tied it at 64 with 26.6 seconds remaining. The Huskies had the chance to hold for the last shot but Chong drove to the basket and lost the ball out of bounds to give the Bulldogs the ball with 12.8 seconds to go.
"Saniya tried to make a great play," Auriemma said. "Just impatient, that's all."
William, who had 41 points in the overtime win over Baylor in the regional final last Sunday, then hit her shot with Williams charging at her to end it.
"I got a little space, jumped up, and made the shot," William said. "I'm in shock. I'm still in shock. It happened at a perfect time."
"I looked at the basket, then I looked at the scoreboard, and I was like, 'Morgan did it again,' " Mississippi State center Teaira McGowan added.
In an instant, it was over.
"The kid made a great play," Auriemma said. "We said if they made a shot we wanted it to be a pull-up. It's one of the toughest shots to make in that situation with that kind of pressure."
She made it.
Vivians led Mississippi State with 19 points. William had 13 and Richardson 12.
"We didn't have to beat them in a best-of-seven, we didn't have to beat them in a best-of-five, we had to beat them one time," Mississippi State coach Vic Schaefer said.
All-American Williams had 21 points to pace the Huskies, whose largest NCAA tournament comeback was from 15 points down against Georgia in 2006. Samuelson had 15 points while Collier had 11 points and eight rebounds.
UConn finishes 36-1.
"That's the record they own," Auriemma said. "I'm proud of what they were able to do and how much they changed since last October. These kids played older than they should have."
For seniors Chong and Tierney Lawlor, they end up 152-2 and with the most wins in a four-year span in NCAA history.
winner will be the first SEC team other than Tennessee to win a national championship. An unprecedented fifth straight title for the Huskies was not to be.
As William's shot went through the net, Auriemma looked on and appeared to smile as he made his way to shake hands with Schaefer.
"No one's won more than we have," Auriemma said. "I understand losing and I know how to appreciate when other people win.
"One play doesn't cost you a game, but one play can win a game. That's what happened."