The wedding day has arrived.
Characters: 
Baptista

Stressed that Petruchio is late, he's even more horrified to see Petruchio's wedding outfit. 

Katherina

Katherina weds Petruchio, and is whisked away from her own reception—against her objections—by her new husband. 

Tranio

Disguised as Lucentio, he reminds the real Lucentio that they need to find a fake father for Lucentio, to vouch for his promises to Bianca. 

Gremio

Gremio describes the absurd wedding ceremony to Tranio and Lucentio. 

Lucentio

Lucentio and his servant Tranio make plans to find a fake father to vouch for his promises to Bianca. 

Bianca

Bianca attends her sister's wedding to Petruchio. 

Biondello

Biondello arrives with news of Petruchio's absurd wedding attire. 

Petruchio

Petruchio's outrageous wedding outfit is outdone only by his outrageous behavior during and after the ceremony. 

Grumio

Grumio attends the wedding and helps his master whisk Katherina away from the reception against her wishes. 

Hortensio

Hortensio attends the wedding as himself. 

Scene Summary: 

It’s Kate’s wedding day, but there’s no sign of Petruchio. Biondello shows up with the news that Petruchio is on his way, and that he’s dressed very strangely. When Petruchio and Grumio arrive, and everyone is shocked by Petruchio’s ridiculous outfit.

After the others have gone to the wedding, Tranio reminds Lucentio of the plan to find a fake Vincentio, father of Lucentio, to make financial promises to Baptista so that he’ll let Lucentio marry Bianca. But Lucentio says he’d be tempted to elope with Bianca if they weren't being watched so closely by the other tutor, Litio. 

Gremio returns, shocked by what he witnessed at the wedding, and claiming that Petruchio is even more disagreeable than Kate. He describes Petruchio’s inappropriate behavior: he knocked down the priest, threw wine in the sexton’s face, and kissed Kate so hard, the smack echoed throughout the church.

Then everybody arrives from the church, and Petruchio announces that he and Kate will be skipping the wedding feast to travel back to his home. Kate disagrees, but Petruchio reminds her that because they’re married now, Kate belongs to him. With the help of Grumio, Petruchio whisks Kate away, but everybody left on stage seems content to celebrate without her.