OXFORD, Miss. -- Brandon Allen threw a program-record six touchdown passes and scored a two-point conversion on the final play of the game as Arkansas upset No. 18 Ole Miss 53-52 in overtime Saturday at Vaught-Hemingway Stadium.
After Ole Miss scored on the opening possession of overtime, Arkansas converted a fourth-and-25 when Alex Collins took a lateral 29 yards.
The Razorbacks scored two plays later on a 9-yard pass from Allen to Morgan. Arkansas failed on its first attempt at a two-point conversion, but a facemask gave the Razorbacks once more chance.
Allen dove into the end zone to give Arkansas the win, sending the Razorbacks onto the field in celebration while the majority of a sold-out crowd of 60,680 sat stunned.
"We told our guys it would take all 70 of them to come over here and play a 60-minute game," Arkansas coach Bret Bielema said. "If we had to play a little bit longer we would, but I know our guys came here to prepared to win. They decided in their hearts they weren't leaving without the win.
"I said before we started overtime, 'Be prepared to go for the two-point conversion.' During the long (replay) delay I told the players if we make this touchdown, stay on the field and go for it."
Arkansas finished with 605 yards of total offense. Allen passed for a career-high 442 yards, completing 33 of 45 passes.
Allen threw three touchdowns to Morgan, who finished with 122 receiving yards on nine receptions. Dominique Reed had seven receptions for 105 yards and two touchdowns.
"I can't say enough about our quarterback," Bielema said. "He is an example of a gladiator. He made some adjusted throws and he was accurate all day long."
Arkansas (5-4, 3-2 SEC) had a chance to win at the end of regulation, but Cole Hedlund's 47-yard field goal attempt was blocked. The Razorbacks won in overtime for the second time in three weeks.
Ole Miss (7-3, 4-2) led 45-38 after an 18-yard touchdown pass from Chad Kelly to Quincy Adeboyejo with 4:55 remaining.
Kelly passed for 368 yards and three touchdowns, and also ran for 117 yards and three touchdowns.
The Razorbacks tied the game on a 17-yard touchdown pass from Allen to Reed with 53 seconds left in regulation.
"Their quarterback played at an extremely high level," Ole Miss coach Hugh Freeze said. "We struggled in every one-on-one situation we had."
The game was tied 17-17 at halftime. The teams combined for 1,195 yards of total offense.
Collins rushed for 108 yards on 17 carries to go over 1,000 rushing yards for the third straight season. But it was the 31-yard gain that went down as a reception that will forever define the game.
"I was crazy, just the momentum swing going from watching the play and everything happening," Collins said. "The guy had him wrapped up pretty good and knowing he wasn't going to break the tackle, I think the game is over. Next thing I know, I see the ball flying through the sky.
"My first thought was, 'Let's try to make something happen out of this.' I just ran for my life out there to try to get the first down. If I put myself in his position, I wouldn't have thought to throw the ball back."
Arkansas beat a ranked team on the road for the first time since 2010.
The Razorbacks are scheduled to play at No. 2 LSU next Saturday.
Arkansas quaterback Brandon Allen scores the game-winning two-point conversion.
Allen is carried off the field by his teammates after the win.
Brandon Allen was knocked down a few times, but was standing tall in the end.
Hunter Henry - whose catch and lateral kept Arkansas alive on a 4th and 25 in overtime - celebrate after the victory.
Drew Morgan was one of two Arkansaas receivers with over 100 yards as he caught 9 passes for 122 yards and three touchdowns.
Dominique Reed had career highs of 7 catches and 105 yards receiving.
Jared Cornelius continued his starring return from injury with 4 catches for 76 yards and a score.
Detrich Wise had a big sack late in the game.
Arkansas redshirt freshman kicker Cole Hedlund drilled a career-long 45-yarder on Saturday.
Hedlund's 47-yard field goal to win it in regulation was blocked.