During a visit to an evangelical church in Virginia, USA, on Sunday, Mr Trump took to the stage with his slick hair combed back - a big change from his famous hairstyle.
It's believed the new style was because he'd come straight from the golf course and didn't have time to prepare his signature do.
Lots of people took to social media to share their comments over the change.
One user said, "Donald Trump's hat hair is even worse than his every day hair."
Another said, "wow he looks like a real person and not an orange Cheeto with fly away hair".
But not everyone was against the new look.
One user tweeted, "Don't you love Donald Trump's hair? Looking good".
What do you think? Should Mr Trump keep his new hair style or go back to his trademark style?
Let us know in the comments below.