The phrase "act incredibly" is correct and usable in written English.
It can be used to describe someone performing in an impressive or extraordinary manner.
Example: "During the competition, she managed to act incredibly, impressing both the judges and the audience."
Alternatives: "perform exceptionally" or "behave remarkably."
The Marvelettes' success predated that of all the other Motown girl groups, and they were the act, incredibly, those groups aspired to.
But it is the case, and I think the Green New Deal is correct in this regard, that we need to act incredibly quickly, at a scale that we've not seen in the country, other than other major mobilizations, to put somebody on the moon or beat the Nazis, for example.
We are still accepting applications for the Battlefield at Disrupt NY 2016, but you're going to have to act incredibly fast, as the deadline to submit your application is today at 9pm PT.
Instead of creating this kind of organic tension between characters, The Walking Dead's writers always have someone act incredibly moronic or out of character and then there's some big consequence for that stupidity.
Hayden Act incredibly impt part of @TomEHayden's legacy.
"But the Legislature as a body is inclined to act incredibly irresponsibly, especially at times like this". Then-Gov.
I find such selfless acts incredibly uplifting, and I know I'm not alone.
Speaker of the House John Boehner acted incredibly quickly to calm a shocked citizenry, reaching across the aisle to condemn the actions of the gunman.
Ch Supt Stuart Barton said: "Staff inside the store acted incredibly quickly, giving immediate medical attention to the man and woman who were injured.
These deaths were rough to watch (I literally had dreams about those heads last night), but the episode was written and acted incredibly well, that last "reveal" sequence in particular as different groups slowly figure out who's missing, and your heart sinks over and over again.
As we engage in civil disobedience today, our prayer is that our President acts incredibly soon to stop the deportations and that he acts boldly and broadly to provide relief to all 11 million undocumented community members across our nation.
