Jarrod Bowen's dramatic 90th-minute goal secured West Ham their first major European trophy since 1965 with a 2-1 win over Fiorentina in the Europa Conference League final on Wednesday.
It is the second European trophy for West Ham after they won the now defunct Cup Winners' Cup 58 years ago with a team including England World Cup heroes Bobby Moore and Geoff Hurst.
Bowen picked up a superb through ball from Lucas Paqueta, before sending a low shot past a helpless Pietro Terracciano in the Fiorentina goal.
"I obviously dreamed of scoring but to score the winner in the last minute. It's what you always say you want to do," Bowen told BT Sport.
"To do it in front of these fans. I thought I was going to cry. I'm just happy."
Said Benrahma had opened the scoring for West Ham in Prague as he blasted a penalty past Terracciano on 62 minutes after VAR had caught Cristiano Biraghi handling the ball while trying to stop Bowen in the box.
Giacomo Bonaventura levelled five minutes later, beating West Ham goalkeeper Alphonse Areola with a fine, low right-footed effort.
Bonaventura capitalised on a superb header back from Nicolas Gonzalez who had leapt over West Ham full-back Emerson.
The champions' name will be the second ever on the Conference League trophy following Roma, who won the maiden edition of the competition last year. West Ham have also clinched a spot in next season's Europa League with the win, while Fiorentina will miss out on European competition after finishing eighth in the Serie A.
West Ham's previous major trophy was back in 1980 when they won the FA Cup.
They spent most of the last season battling the prospect of relegation, finishing 14th in the Premier League in the end.