Lasith Malinga produced an outstanding exhibition of death bowling to secure a dramatic one-run win over Chennai Super Kings and seal a record fourth Indian Premier League title for Mumbai Indians.
Chennai needed only nine runs off the last over to retain their crown and become the first team to win the IPL four times, but Malinga held his nerve to deny MS Dhoni's side.
CSK required four to win off two balls after Shane Watson was run out for 80 having hesitated going for a second as the tension built in the final over in Hyderabad on Sunday.
Shardul Thakur struck the penultimate delivery for two, but was trapped leg before by the ice-cool Malinga off the final ball to spark huge celebrations from the Indians and their supporters.
There was nobody more relieved than Indians teenager Rahul Chahar, who dropped Watson on 42 and 55.
Deepak Chahar, Rahul's cousin, earlier took 3-26 and Imran Tahir claimed 2-23 to restrict Mumbai to 149-8, Kieron Pollard top scoring with 41 not out off 25 balls.
Watson was named man of the match after smashing an unbeaten century in last year's final against Sunrisers Hyderabad and looked set to see CSK home again, but fellow veteran Malinga was the hero on this occasion.
Chennai have now lost three out of four deciders they have played against Mumbai, who were worthy champions after being top at the end of the regular season.