Manchester United could become the first team to win the Champions League two seasons in a row after beating Arsenal in the semi-finals.
Ji-Sung Park opened the scoring after eight minutes and three minutes later Cristiano Ronaldo fired in a long-range free-kick to make it 2-0.
Ronaldo grabbed a second after half-time before Robin van Persie smashed in a penalty to make the final score 3-1.
United will play Chelsea or Barcelona in the final in Rome on 27 May.
The only bad point for United was the sending off of midfielder Darren Fletcher, as he will be suspended for the final.
Darren Fletcher is sent off
TV replays appeared to show Fletcher won the ball before taking down Cesc Fabregas, and now United are trying to stop him being banned.
On Wednesday night Chelsea play the second leg of their semi-final tie against Spanish side Barcelona.
Last week they battled hard to earn an excellent 0-0 draw away to Barcelona.