DETROIT -- Pittsburgh is the City of Champions once again.

The Steelers used a trick play and the speed of Willie Parker to score two second-half touchdowns and beat the Seattle Seahawks 21-10 in Super XL at Detroit's Ford Field. The Steelers become only the third franchise to win five Super Bowls, joining the Dallas Cowboys and San Francisco 49ers.

The big play came in the fourth quarter when Antwaan Randle El hit Hines Ward with a 43-yard touchdown pass that put the Steelers ahead by 11 points midway through the fourth quarter. It was a lead they would not relinquish. The play was set up by an interception by Ike Taylor, who stopped a drive by the Seahawks when it seemed as if they were going to take their first lead since midway through the second quarter.

Parker earlier showed how he earned the nickname "Fast" Willie Parker.

Parker burst through the line and sprinted 75 yards for a touchdown on the second play of the third quarter to give the Steelers a 14-3 lead. It was the longest rushing play in Super Bowl history, eclipsing the mark set by LA Raiders standout Marcus Allen in Super Bowl XVIII by one yard. Once Parker broke through the line, he only had to outrun Seattle defensive back Michael Boulware to make it to the endzone.

The Seahawks responded with an 8-play 39-yard drive but couldn't cash in as Josh Brown's 50-yard field goal attempt sailed wide left, his second miss of the game. Both of his misses were from 50 yards or more.

Pittsburgh was poised to take control of the game on the ensuing possession when the Steelers drove to the Seahawks 7.

But on third-and-goal, Ben Roethlisberger's pass intended for Cedric Wilson was picked off by Seattle defensive back Kelly Herndon at the 3 and he returned it 77 yards to the Steelers 20. Three plays later Seattle quarterback Matt Hasselbeck hit tight end Jerramy Stevens with a 16-yard touchdown pass to pull the team to within 14-10 with 6:51 to play in the third quarter.

Pittsburgh led 7-3 at the half thanks in large part to a defense that bent but would not break and an offense that capitalized when given the chance.

The Steelers took the lead on a one-yard touchdown run by quarterback Ben Roethlisberger with 1:55 to play in the half. Roethlisberger was brilliant in the leading the 12-play, 59-yard scoring drive, which was the only drive the Steelers were able to sustain in the first half..

Roethlisberger made two key plays in the drive and both were a result of improvisations by the second-year quarterback. The first was a flip for 12 yards to Hines Ward that gave the Steelers a first down at the Seahawks 43.

A few plays later, on third-and-long, Roethlisberger scrambled outside the pocket and threw back across the field to Hines Ward at the 3-yard line. Two plays later, Roethlisberger ran around left end and dove into the endzone -- barely -- for the Steelers touchdown.

The Steelers defense and some very costly penalties on the Seahawks kept them in the game until the offense got warmed up. Pittsburgh did not register a first down until there was 11:15 to play in the second quarter and they did not cross midfield until there was 6:17 to play in the half.

The Seahawks had a chance to pull closer but Brown's 53-yard field goal attempt with two seconds remaining in the half sailed wide right.

Pittsburgh trailed the Seahawks 3-0 heading into the second quarter, but it could have been worse had it not been for a couple of key penalties against the Seahawks offense. The first was a holding penalty on Seattle guard Chris Gray which negated an 18-yard third-down pass from Matt Hasselbeck to Darrell Jackson that would have given the Seahawks a first down at the Steelers' 23. Instead, they faced a third-and-16 at their 41. Hasselbeck then threw incomplete and they were forced to punt.

The second major penalty of the quarter came the next time the Seahawks touched the ball and was an offensive pass interference penalty against Seattle wide receiver Darrell Jackson which negated a touchdown pass. The Seahawks had to settle for a 47-yard field goal by Brown to take a 3-0 lead with 22 seconds remaining in the quarter.

Seattle dominated the first quarter, as they held the ball for more than 10 minutes, ran 19 offensive plays to the Steelers 9 and outgained the Steelers 85-17.