Usually, with a comma immediately following.
Incredibly, the boxer sprang to his feet and delivered a devastating knock-out blow to the champion's head.
Incredibly, I answered quickly and correctly.
Example sentence - His daughters are incredibly selfish and demanding.
Savannah was incredibly beautiful.
Your mother is incredibly obese. you are incredibly fast.
She fluxxomed the teacher by doing incredibly well in math.
The top of the volcano disappeared in an incredible explosion. The police found the criminal's explanation completely incredible.
no you cant only @ certain times
All the people we work with are incredibly awesome.
I bought some incredibly expensive salmon from a fishmonger on Sunday.
His wife was incredibly house proud and their home was immaculately clean.
intensifiers
The boy found the project to be a piece of cake because it was incredibly easy.
"The corpse was incredibly delicate, after being ravaged by years of decay."